Taekwondo dan rankings are divided into one through nine, as well as the honorary tenth dan, all unified with a black belt color.
The minimum requirement for coaching is a black belt, professional athletes and Taekwondo masters are also black belts, so the depth of this rank is quite profound.
First to third dan black belts are called deputy instructors, fourth to sixth dan are instructors. Only those above fourth dan and at least 21 years of age are eligible to apply for international coach or referee, and qualify to be the head of a dojo or the head coach.
Seventh to eighth dan are Master Xian, and ninth to tenth dan are Master Sheng.
