Martial Arts

Who We Are And Why You Should Train Here

Since we’ve opened, we’ve been dedicated to changing the lives of people through Jesus Christ, one person at a time. We use Christian Martial Arts to achieve this goal. We strive to provide a safe, comfortable and welcoming atmosphere for all students and family members. We take pride in creating an environment for individuals to achieve, develop and succeed in their personal goals.

We strongly believe that Christian martial arts can be for everyone, regardless of age, sex or experience levels. Throughout all of our programs, students will not only learn the necessary skill sets to protect themselves both spiritually and physically, but we stand behind our realistic and practical approach, confident it will enable every member to achieve greatness and live their best life.

Our Martial Arts Curriculum

Our Martial Arts program is divided into three segments: Tiny Tornados, Essentials, and Elite. Tiny Tornados and Essentials are our beginner groups. If your child is under 7 years old, they will join the Tiny Tornados. Starting from age 7, they can participate in the Essentials group. Both groups focus on the fundamental aspects of Martial Arts, teaching techniques like basic stances, punches, blocks, kicks, and safe falling, along with mindset training. These groups follow a rotating curriculum, allowing beginners to join at any point.  Once the student has gone through the full curriculum in these groups and is at least 7 years old, they are eligible to advance to the Elite group. This group introduces more sophisticated techniques.

The Elite group’s curriculum also rotates but encompasses various Martial Arts styles: Japanese bare-knuckle, knock-down karate, Brazilian Jiu-jitsu (BJJ), Filipino Kali, and Israeli Krav Maga. Elite students also practice Catch Wrestling from Monday to Thursday, with sparring exercises on (Fighting) Fridays. For an explanation of the required sparring gear, please click here

1st Trimester

Philippino Kali – Also known as Arnis or Eskrima, is the national martial art of the Philippines. In this rotation, our Elite students learn how to defend themselves with the use of the Daga (dagger) or Baston (stick).

2nd Trimester

Krav Maga – Originally developed for the Israel Defense Forces, is an aggressive approach to self-defense in any situation, making use of “dirty” tricks to make it as effective as possible.

3rd Trimester

Japanese bare knuckle, full contact, knock-down Karate – This rotation focuses on stand-up fighting, utilizing punches, blocks, kicks, sweeps, throws and blindspot manipulation.


BJJ (Brazilian Jiu-jitsu) – Excellent ground defense. During this rotation, our Elite students focuses on defending themselves if they find themselves on the ground with a variety of chokes, arm-bars and escape techniques.

Our Academy teaches students the fundamentals of martial arts and self-defense. We take a Christ-centered approach to martial arts training, emphasizing not only physical skills but also mental and spiritual development. Our classes are designed to cultivate discipline, confidence, respect, and patience in our students.

Understanding Tip Testing, Graduation, and Belts

Just as academic grade levels denote a student’s progress in school, belt ranks in Martial Arts signify their advancement in the program. To earn the next belt rank, students must pass a Martial Arts test during a Martial Arts graduation ceremony. However, before they can take this test, they need to earn three “tips” which serve as checkpoints confirming the student’s understanding of specific parts of the curriculum.

Earning a black belt in Martial Arts is similar to attaining a bachelor’s degree in academia. Just as a degree generally requires four years of study, obtaining a black belt also necessitates four years of dedicated training as an Elite student. Yet, the journey doesn’t have to stop there. Much like in academia, there’s always the opportunity for further study to enhance your understanding and proficiency in Martial Arts. The world of Martial Arts offers an endless path of learning, growth, and mastery.

*For a more detailed overview of the Martial Arts curriculum, please click the “Parent Links” at the very top of the website, or simply click here.*


If you are interested in a more in-depth explanation, please read the 7 sections below

1 - Price Value Comparison

Dear New Warriors Family,

I’m very excited about your enrollment at Warriors! We are ABSOLUTELY CERTAIN your investment will return benefits that are worth many times the money, effort, and energy invested!

I wanted to share with you a personal story….. When I first began teaching Karate, my Sensei required that, after 12 months, every teen and adult student had to teach in at least one class a week.

As a young man, that was certainly a boost to my self-esteem and confidence. I became more assertive and comfortable in relating to people – individuals as well as groups, and children as well as adults.

These skills, along with my faith, have proven to be critical to my success in the world of business, ministry, and teaching others to be leaders.

If I were to put a price on them today, well, I just can’t.

They are priceless!

How could you even quantify these qualities??

Now picture this:

Your son tells you not to worry anymore. He stood up for his faith. He stood up to the bully. Not only did he stand up to the bully, but two of the bully’s friends. And he did it without resorting to violence and actually praying for them.


Your shy child comes home from school beaming proudly proclaiming they got an “A” for their oral book report.


Your child performs all household chores – without being asked!


You introduce your friend to your son and he gives a firm handshake and confidently says “Pleased to meet you, ma’am/sir.” Or

You get the promotion that you were working so hard for. Or

The business or ministry that you finally had the confidence to start has its first SUCCESS!

Our WLP – Warriors Leadership Program is designed to teach you and/or your family Biblical life skills – or success skills if you will.

Our goal is to work with you to give you everything needed to understand God’s purpose for your life while equipping you with the skills to follow that path successfully. We aim to make your investment in this program the best you will ever make.


Scott Maczuga

Pastor / CEO / Kyoshi

2 - Confidence

Do I /we really have what it takes to be a Warrior Black Belt for JESUS CHRIST?

Have you ever asked yourself this question? Do you know that person who can do it all?

You know, the one back in High School, who was unmovable in their faith walk, on the big sports team, all over the yearbook, and on the honor roll? The one who was able to endure the hard times, driven to get into the right Christian schools, and had all the right job opportunities? Now they have great Christian friends, a sense of peace, and purpose in their vocation. How would you describe that person? What qualities do they possess? Now imagine that same person as a child in elementary school. What do you think they were like when they were ten years old? Can you already see the seeds of their faith at that age? How about at age eight? What characteristics are they already likely to have at eight that will carry through to High School and make them a strong Christian leader later in life? Most people will list many qualities but the most common answer is a strong confidence through Faith in Jesus. It’s been proven that confidence and faith start early, can be built strong by eight, and has a profound effect on a person’s character for the rest of their life.

You don’t have to just hope that you or your family will just magically wake up with this kind of confidence, because you are about to discover how you can get it now – quickly and easily.

You see, confidence is simply the “Yes I Can” feeling that comes from taking on challenges and succeeding at them. Every time we set a goal that we know will be a challenge and overcome it, it plants the seed that “I can do it through Christ who strengthens me.”

Martial arts are one of the ONLY activities I know of, that most children and adults are crazy about, that has a built-in goal-setting system.

Everyone starts at White Belt with the long-term goal of Black Belt (and beyond) and all the belts in between are shorter-term goals. We don’t give these belts away, you earn them and you know it.

I love playing team sports, but many times team sports aren’t for everyone. Maybe the two or three stars on the team feel great about themselves, but unless you have a truly extraordinary coach, most players are walking off the field feeling inferior, frustrated, or at best content after many of their games. There is just no system to make every person feel successful, and there is a lot of pressure from the team if you fail, make a mistake, or just plain mess up. In fact, the Legendary NFL Coach Vince Lombardi said,

“Traditional competitive sports don’t build character; they simply weed out those who don’t have it!”

On the other hand, in martial arts, as a student climbs through the ranks, they meet challenges, and overcome the difficulties that each new level brings; they learn over and over again “Yes – I can do it through Christ who strengthens me”.

Soon this thinking becomes a habit.
Combined, all of these things make for a person who is going to make the right decision

for Christ, even if it is hard.

At Warriors, our students learn discipline through Christian Martial Arts. The martial arts training is steeped in Christian culture, which teaches faith, respect, honor, self-discipline, confidence, and prayer. Anyone can do it and succeed at Warriors!

Easily Increase your and your family’s Confidence with our Warriors Leadership Program… Faith… Honor… Discipline… Athleticism… Get your children on the honor roll… be secure knowing you or they can defend the faith, themselves, and others… know how to make responsible decisions… know how to handle bullies (adults and kids)… and build the Biblical life skills and worldview that will give you the tools to succeed for the rest of your lives!


Scott Maczuga

Pastor / CEO / Kyoshi

3 - Progress Tips and Belt Graduations

Each belt at Warriors represents a progression in learning. The exact order of the belts is not as important as the concept behind them. Warriors consider each belt a goal. Each of these goals builds to a black belt and beyond. For students, regardless of age, the experience of achieving each belt rewards them with valuable goal-setting skills, perseverance, and of course, an increasing skill level. Our instructors are tasked with two main missions. The first is to teach, the second is to keep students motivated so they can achieve the highest level of results, and truly benefit from our program. The Warriors approach to belts, tips, and graduations offers instructors the tools they need to do both. The system allows instructors to teach clearly defined semester curriculums while offering students a motivational target (or goal) to aim for.

When an instructor recognizes that a student is ready for their next belt he or she will issue a testing/graduation form. This is an invitation to attend a graduation where students demonstrate techniques learned to date. A belt graduation signifies that the student is ready to advance to the next belt, thus beginning a new cycle of learning and a new set of goals.

You may notice that students receive colored strips of tape on their belts. Warriors refer to these as “progress tips”. Each tip color corresponds to particular elements of the curriculum. Each tip represents a mini-step between belt levels – it is treated like their test for that particular element of the curriculum. Tips basically symbolize that the student has tested and achieved proficiency with the corresponding techniques. Students must test and earn three tips at each belt level. Tips are awarded during class, only on specific weeks.

For students and instructors, the tips offer a visual cue of a student’s progress at any particular time. Tips also visually pinpoint areas where a student may still need work. Perhaps most importantly, tips offer motivation for the student. As students progress, techniques become more challenging. The tips allow students to experience bits of progress toward a larger goal. Testing and earning tips during class also allow instructors to pre-qualify students for belt advancement and graduation at a later date.

Tips can be understood as individual stepping stones on a much longer path. It is important to remember that tips are awarded at the instructor’s discretion. Tips are awarded to each individual based on their own strengths and weaknesses. Generally, instructors look for increasing skill in balance, speed, power, form, and focus for particular techniques. Tips come with time, practice, and effort. If you have questions about progress or a technique, always feel free to respectively discuss them with your instructors. See below what our four progression tips are, and what each color represents.



Our program is made up of blocks of information. Each block is a 3-month period (a quarter). To move through the block system, a student must successfully test at the end of each quarter for each of the blocks. Once a student has progressed through eighteen, 3-month blocks successfully, they will test for Black Belt.

It does not matter what block that a student starts at. An example would be that a student could start at block 3, and then learn blocks, 4, 5. Or they could start at block 1, then 2, 3, etc. t As long as 18 blocks are successfully tested, then the requirements are met.

As you can see, we at Warriors have put a lot of effort and thought into creating the best learning experience for every age and commitment level. We are completely dedicated to helping you reach a black belt and beyond!

Should you have any questions, ask any one of our team. We are here to assist you in reaching your goals…


Sparring is a controlled match with a partner where footwork, kicks, punches, blocks, throws, joint locks, pins, wrestling, and submissions are practiced within a set of rules. Sparring is practiced for strategy and experience in the execution of various skills. Warriors teach several types of sparring that serve to challenge students of various skill levels.


No Contact Sparring: Typically practiced by beginner students, this type of sparring requires no special safety gear. Students face one another and practice their kicks, punches, and blocks without making physical contact. Techniques are thrown to areas above the waist and below the neck, but not to the backside. Hands are to be kept up in a defensive position so that a technique does not accidentally make contact with the torso or head.

Light Contact Sparring: Usually practiced by students with a few months or more of experience. Participation requires a safety gear set, which includes headgear, chest protector, hand pads, leg pads, groin protection, and a mouthpiece. Students face one another and practice their kicks, punches, and blocks while making light/controlled contact with one another.

Bigger, older, or higher belt students should use extra control when sparring against smaller, younger, or lower belt partners.

Full Contact Sparring: Practiced by students who are at intermediate and advanced levels. This should take place for students with a minimum of 6 months or more of sparring experience. Strikes to the legs, body, and head are allowed. Head contact should always be controlled. This sparring is optional, but is especially fundamental in “Full Contact Tournaments”, as well as for actual self-defense.

Flow Rolling: This utilizes wrestling, Brazilian jiu-jitsu, and other grappling arts to practice pinning, joint locks (ie – arm bars, leg locks, kimura joint locks), chokes, opponent control, and the defenses against them. No punching or kicking is included in flow rolling

Weapons Sparring: Warriors uses Filipino Kali and Apache Knife Systems to teach knife and stick sparring and defense. As such we use padded weapons and sparring gear to spar and compete.


Head butts, groin shots, biting, eye gouging, and hair pulling are not allowed, unless in controlled Krav Maga adult classes. Safety is a priority at Warriors; however, students and parents are also responsible for ensuring a safe, yet educational experience for all. Students should conduct themselves in a manner that is safe and mindful of the safety of others. Students and parents should immediately raise any perceived safety concerns while sparring, with instructors and staff.


You will notice that we have multiple belt systems at Warriors. Each one is designed to spill into the next one as the student ages or jumps levels.

Our Tiny Tornados are ages 4-6 and are signified by white belts with colored stripes. This curriculum is designed with more skills and drills to teach gross motor skills, listening, coordination, balance, and teamwork. If a child has completed this program and successfully tested through all the belts, it would be the equivalent of learning everything at a white belt level. They should be able to test for their Gold Belt in the next program.

Our Family Essentials ages 7 and up, are signified by colored belts with black stripes through them.

Our Krav Maga and BJJ ages Ages 12 and up are signified by colored belts with black stripes through them.

In our Warriors Leadership Program ages 7 and up, WLP students learn Christian leadership principles, teaching tools, public speaking, service to others, and biblical worldview. If they are 12 and above, and interning, they wear an assistant Instructor belt which is half brown belts and half black. If they are below 12 they will have a patch that is indicative of their level of WLP training. This includes SWAT, STORM, LEADERSHIP, and MENTOR. For more information on how to be nominated for this program, please speak to the Floor Manager / Lead Instructor.


Scott Maczuga

Pastor / CEO / Kyoshi

4 - Leader of Character

Will You and/or your Family Be Warriors for Christ?

A leader of character has all of the qualities we normally associate with leaders—ambi- 1on, confidence, courage, intelligence, eloquence, responsibility, crea1vity, compassion— and one thing more which we, unfortunately, overlook too frequently among civilian leaders: A leader of character is absolutely trustworthy, even in 1mes of great stress and can be depended upon to put the needs of others—the organiza1on, the community—above personal considera1ons—not now and then, or when the spirit moves him, or when it will look good on his resume—but in every instance.

Excerpted from The West Point Way of Leadership”

“A Person is only as good as their Word”

I’m sure you’ve heard that saying before. Today, our “leaders” are constantly telling us to do as they say, but sadly, not as they do. Time after time, they claim to hold the moral high ground (character) only to break our trust when their private failings are made public. What kind of example do they set for our children and us?

It takes a lot of work to be a leader. It takes hard work and sacrifice. It takes strength of character. Godly Character is what’s lacking in so many of the people we all look to for Leadership these days. Godly Character is what will guide a person through life. Godly Character is what gives us the strength to make tough decisions.

You probably didn’t know this, but you’ve already taken the first step to help yourself and/or your child become a Christian leader. By enrolling at Warriors, you/they have already begun to grow – spiritually, physically, intellectually, morally, and emotionally. That’s a great start. The next step is to apply for our WLP Warriors Leadership Program.

Some will say a person’s character is measured by what they do when nobody is looking – How a man treats his wife behind closed doors or whether he honors his word and does what he says he’s going to do. The question I have for you is – “Is that the adult you want to be or want your child to become?”

Let me read you a testimony from one of our students.

I cannot say enough about the positive role Warriors has had in my son’s life. When we first became involved in karate, my son was only 7 years old and, like many boys his age, we were looking for help with self-control, discipline, balance, and coordination.”

“My son began his training at Warriors when he was 9 after moving from Connecticut. He still struggled with balance and coordination problems and his flexibility and endurance were poor. My husband and I were so pleased to see many improvements in all areas. In a relatively short period of 1me, all these issues were resolved and his level of physical fitness became excellent.”

“A few months before his 12th birthday, my son earned his junior black belt. This achievement has filled him with pride and a sense of accomplishment. Now a teenager, I am so proud of the young man he has become – one who is following Jesus, has healthy self-esteem, practices leadership, and discipline, and understands how setting and achieving goals lead to success. I credit the training in Christian martial arts that he receives from the Warriors Leadership Program as playing a significant role in who he is becoming as a person. For my husband and me, it is a challenge and an investment that is priceless, and one that I wholeheartedly recommend to anyone who wants to see their child succeed in life.”

Our job as parents are to be, and raise, God-fearing adults capable of navigating a sin-filled, crazy world. How you do that will be a reflection of the job you did in biblically guiding them or yourself.

The WLP Warriors Leadership Program will give you and your child the biblical world- view, tools, and knowledge, to build exemplary Christ-like character and be the Christian leader everyone SHOULD be.

Contact our team today to learn how you can join this amazing Program. It will provide you or your family the strength of Christian character, to become a leader of character!


Scott Maczuga

Pastor / CEO / Kyoshi

5 - Black Belt

Dear Parent:

At this point in your you or your family’s training, you may be asking yourself;

Is attaining a Black Belt a realistic goal?

Since the beginning of your experience at Warriors, you’ve had the chance to experience what growth begins to look like – to become more self-confident, stronger, and more self-disciplined.

Think back to when we had our conversation about learning martial arts; you may have thought or even said that you were unsure about making it to black belt.

Many people felt the same way when they first started, but now aLer four and a half years of training, 4 and a half years of watching their faith & skill grow bigger and better than they ever thought possible; these same people see that the small sacrifices are definitely worth it.

A few years ago, one parent told the story of how his son had asked for three years to take karate lessons. They kept telling him no, thinking it was just a phase he was going through. Finally, they brought him into class and let him join our Kickstart trial program, just to try it out.

Now… Sensei Nguyen is a Black Belt, a graduate of the University of Texas San Antonio, a senior member of our leadership team when he is in town, and one of our most incredible veteran instructors, as well as an incredible member of our community.

What’s even more incredible is that his sister became a black belt instructor too, following in the footsteps of her brother! She was only 15 when she became a Sensei!

Did this family have doubts? Of course, they did.

Did they have to take the time to bring them to class, cook dinner later than normal, and not play other additional sports for a season? Of course, they did.

But, the most important thing they did, was they made sure he had all the support they could muster (and even some they couldn’t) to see it through to the end.

You see, becoming a black belt is a family journey, not an individual quest.

It takes support from your child’s school teachers, Pastors, the instructors at Warriors, and, most importantly, from you.

You or your child CAN become a black belt, a Christian leader, and a shining example of the values that you want the world to see.

  • It takes work
  • It takes faith
  • It takes commitment
  • It takes courage
  • It takes your support

But, just imagine what you or your child will have accomplished, and the lessons you or they will have learned about LIFE in the process! We’ve helped THOUSANDS of students just like you or your child accomplish their goals, and we’re excited to take the next steps in this journey together!

Call our Admissions Director and set up an appointment, and ask a simple question: How can we enroll in the WLP – Warriors Leadership Program, to become a Black Belt Instructor?


Scott Maczuga

Pastor / CEO / Kyoshi

6 - Schedule Time

Dear Warriors Parent / Student,

You’ve heard the expression, “Time is money.” I don’t agree with this – I think time is far more valuable than money. We can always make more money, but we can never make more time, or replace lost time.

My teacher used to explain how martial arts can help us stay healthy and live longer, but he always followed it up by asking us the purpose of a longer life: Is it so we can watch more television re-runs, or does the extra Fme in our lives have much greater meaning and value?

Christian martial arts are known to help children, and adults, cultivate more meaningful lives. Our training builds confidence and a “YES I CAN THROUGH CHRIST WHO STRENGTHENS ME” attitude that set the foundation for success and leadership skills. Along with success and leadership skills, we develop the personal qualities of greater Biblical wisdom and compassion.

The key to you and/or your child acquiring these qualities and benefits is simple: Put in the time!

Time is really the only factor that distinguishes success from failure in Christian martial arts. Some people are natural athletes, while others are inherently clumsy. Some folks are mentally gifted, and others are challenged. Some are outgoing, while still others are shy. But all who continue training to Black Belt and beyond with us, develop incredibly meaningful and valuable lives through Jesus.

The only thing that could prevent you or your child from succeeding in our Christian martial arts is the failure to put in the time. I would love to tell you that you can earn a Black Belt and realize all the character benefits of a Black Belt in just a few weeks or months, but that isn’t so.

Just as tea leaves in a teapot take time to steep, and will only settle when they are naturally ready, martial arts character-building takes time.

On average, six and a half years of training is needed to earn a 2nd degree Black Belt and establish the habits and qualities that ensure a lifetime of Christ-centered Black Belt success.

If six years sounds like a long time to you, remember — the time is going to go by anyway! So the question becomes, what is the best use of this time? Will the time be wasted and squandered each day, or will it be well spent as an investment for a future of service to Jesus, redeeming the time for Him?

I know what you may be thinking. You want to dedicate your time to ensure that you and/or your child develop the benefits of a Black Belt, but you just don’t seem to have enough time to dedicate. How will you manage to get your child to class over the next few years with your already hectic schedule and many commitments to work and family? And what about keeping enough personal time for your own sanity?

The good news is lots of people, just like you, have made it possible to reach Black Belt and beyond. And it needn’t be as difficult as you might think.

We have purposely created our Program Menu so that you can come as little or as much as you would like! You don’t even need to come for more days when you join our Unlimited Program. You can just stay for more classes on the days that you come. And as you advance you learn to focus and train more efficiently, making more progress in less time.

Of course, if you do not have extra time right now and want to schedule more classes down the road, we welcome that. If all you can schedule are two classes a week, you can still become an accomplished Black Belt!

One other point to remember is that we teach time management skills to our Warriors Leadership Program students. You and/or your child will actually learn how to balance school, work, and other responsibilities and find more time to train and practice at home, helping to ensure maximum progress and superior Christian Black Belt results.

In closing, W. Somerset Maugham said,

“The passing moment is all that we can be sure of; it is only common sense to extract the utmost value from it.”

As adults, we realize that the moments of life are really all too few. I hope you will extract the utmost value from each of those moments.


Scott Maczuga

Pastor / CEO / Kyoshi

P.S. – I really do believe it’s important that as a parent, you dedicate time for yourself to keep your own sanity and peace of mind. If you have not already done so, have you inquired about trying some of our classes, with or without your kiddos? We would love to have you join us!

7 - Gray Belt

Congratulations on earning your new GRAY BELT! This is the first of many great “Christian Martial Arts” accomplishments:

You have made great progress; the Warriors Gray Belt is the first milestone in your goal of becoming a Black Belt!

“A Journey of a Thousand Miles Begins With a Single Step!”

One of the most powerful lessons you must learn in life, and in Martial Arts, is how to set a goal and commit to achieving it! Now is a great time to begin considering what your short, intermediate, and long-term goals are at Warriors.

Have you set your goal to become a Black Belt or a Black Belt Instructor?

As you’ve probably already seen and heard, we are a Black Belt Instructor School. This means 2 things; first, our school’s goal is to focus on people who commit to becoming strong, bold, Christian Black Belts. Second, most students in the school COMMIT to becoming Black Belt Instructors!

The path to Black Belt and beyond looks like this.

When you first joined, you probably enrolled in a Trial Program with us

…then, you were accepted into our Beginner Program or Tiny Tornadoes programs, which are foundational WLP Prep Courses

…next, when you reach Gray Belt, you should be considering or seeking out our WLP, Warriors Leadership Program; these programs will take a student all the way to their Black Belt and beyond as an instructor!

The WLP is designed to be the Premiertraining experience, and should be considered for the most enthusiastic students, as well as those who can benefit from EXTENSIVE and Inspiring mentorship and Martial Arts Skills Training!

If you think you would like to be considered for any of our next-level programs, you should talk it over with your Lead Instructor right away. They will happily walk you through the most appropriate program. This is also a great time to be discussing a Black Belt Instructor commitment at home with family!

Warriors has been immensely successful over the last 3 and a half decades, in large part because of the involvement and support of our parents and students. Any educational experience is a partnership between the student, the teachers, and the parents! The greatest long-term results are achievable through our successful partnership and teamwork.

The parents and families at Warriors are such great supporters of our programs and because of that about 70% of our new students come to our school as a direct referral from a current student! We would like to say “Thank You” for the honor of serving your friends and acquaintances. Your referrals are the biggest compliment you could ever pay us!!

If and when anyone you “refer” to us enrolls in one of our programs, we will give you $50 CASH or TWO Private Lessons with the instructor of your choice!

Make sure that when your friend enrolls, they tell us you referred them. That way we’ll know who to give the credit to!

Thanks in advance for entrusting us with your & your family’s training, as well as your support!


Scott Maczuga

Pastor / CEO / Kyoshi