GKYS Video Sales for Instructor

Video-Based Study Program

Learn Gongkwon Yusul the right way.
Not faster. Not easier. Just correct.

Learn Gongkwon Yusul the right way.
Not faster. Not easier. Just correct.

What This License Is

The GKYS Training License is a video-based study program designed for those who want to understand Gongkwon Yusul through its original structure, principles, and logic, directly from its founder.

This license confirms that you have studied Gongkwon Yusul through an official and approved training route, using curated instructional video material.

It is not a rank.
It is not an instructor certification.
It is a formal entry into the GKYS system.

The GKYS License System

Gongkwon Yusul licenses are structured to clearly separate learning, method usage, and instructional authority.

Level 1 – GKYS Certified Practitioner (This Program)
• Official study license
• Video-based training material
• Personal use only
• No teaching or instructor rights

Higher levels require long-term training and direct evaluation.

How to Join

Joining is simple and personal.

1. Make payment via PayPal
2. After confirmation, you will receive:
   • Training video file(s)
   • Official GKYS Training License PDF
   • Usage guidelines

All materials are sent personally by email.

License Fee

This reflects:
• Founder-direct instruction
• Limited distribution
• Official recognition of study completion

Gongkwon Yusul Instructor Videos 1 and 2

These are educational videos produced by Grandmaster Kang as a young man.

This product is a video-based training license for the study of Gongkwon Yusul.

If you apply on the website, we will let you know the PayPal account where you will pay the fee by email.

Upon payment, the purchaser will receive official GKYS training video material and a digital GKYS Training License document via email.

This license confirms completion of an approved study program and allows personal study and research only.

Price: USD 90

Delivery: Digital (Email)

Start with the $90 Video License.
After sufficient practice and preparation,
you may apply for the Official GKYS Instructor Video Course.

If you later choose to join the instructor course,
the $90 Video License fee will be deducted from the total course cost.

About the Videnseo License Design

Yi Sun-sin(1545–1598), the inventor of the Turtle Ship,
was a naval commander without parallel in either Eastern or Western history.

During the Imjin War—a time when the very survival of the nation was at stake—
he achieved a flawless record of 23 battles and 23 victories,
and is remembered as the only admiral in history who never lost a single naval battle.

He was always at a disadvantage.
His forces were smaller, his number of ships limited, and his supplies insufficient.
Yet Admiral Yi did not force victory through raw power.
Instead, he completely reversed the course of the war through tactics, structure, and absolute control of the battlefield.

The reason his name continues to be recognized and studied worldwide
is not simply his bravery,
but the fact that he successfully implemented a complete naval warfare system in real combat.

The Turtle Ship in the License Design

— A Warship at the Highest Level in Naval History

The Turtle Ship is regarded as the world’s first ironclad warship.

Deployed in actual combat by Admiral Yi,
its structure and concept alone placed it far ahead of its time—
not only in its era, but in the entire history of naval warfare.

A fully covered deck that completely blocked enemy arrows, fire attacks, and boarding

A multi-directional firepower system capable of cannon fire from all sides

A defense-centered design that remained stable even in close-range combat

Structural stability that allowed the commander to maintain full control of the battlefield

The core philosophy of the Turtle Ship was revolutionary:
“Strike decisively without being struck.”

It was neither a simple ramming vessel nor merely a gunship.
It was a warship designed to dominate the battle itself.

The Crane Wing Formation in the License Design

— A Strategy That Defeats the Enemy Without Direct Force

The Crane Wing Formation (Hakikjin)is a surrounding battle formation
modeled after a crane spreading its wings.
Rather than relying on frontal collision,
it gradually envelops the enemy, collapsing both formation and command center.

The true danger of this strategy lies
not in overwhelming firepower or speed.

The enemy believes the battle is still ongoing

In reality, they have already entered an inescapable structure

Victory is determined before physical collision ever occurs

The Crane Wing Formation demonstrates how Admiral Yi understood warfare
not as a collision of force,
but as a battle of structure and design.

The Gongkwon Yusul license is designed to reflect the depth of Korean culture and history,
and is intended to hold lasting value as a meaningful collectible.

With the official seal of the founder of Gongkwon Yusul,
the license gains formal authority and an added sense of prestige and authenticity.