Chon-Ji hyung, Dan Gun hyung?

What do these names mean, and where did they come from?

They are part of the original Chang-hon Taekwondo Hyung (Form or pattern). This set was developed by General Choi Hong Hi, founder of the International Taekwondo Federation (ITF). 

The set contains 24 patterns, each named for a significant person or event in Korean history. The total of 24 patterns represents the number of hours in a day. Most schools using this set of forms use the first nine patterns for color belts.

Dan Gun

Named after the legendary hero and founder of Korea in 2333 BC.

1. Shift the balance to the right foot; pivot 90° to the left -back stance double knife hand guarding block

2. Step forward - front stance high punch.

3. Shift the balance to the left foot; pivot 180° to the right - back stance double knife hand guarding block

4. Step forward - front stance high punch.

5. Shift the balance to the right foot; pivot 90° to the left - front stance down block

6. Step forward - front stance high punch.

7. Step forward - front stance high punch.

8. Step forward - front stance high punch, kihap.

9. Shift the balance to the right foot; pivot 270° to the left counterclockwise - back stance square block

10. Step forward - front stance high punch.

11. Shift the balance to the left foot; pivot 180° to the right - back stance square block

12. Step forward - front stance high punch.

13. Shift the balance to the right foot; pivot 90° to the left - front stance down block

13b. Re-chamber - rising block.

14. Step forward rising block.

15. Step forward rising block.

16. Step forward rising block, kihap

17.  Shift the balance to the right foot; pivot 270° counterclockwise - back stance knife hand strike (I-O)

18. Step forward - front stance high punch.

19. Shift the balance to the left foot; pivot 180° to the right - back stance knife hand strike (I-O)

20.  Step forward - front stance high punch.

   

Move your left foot back to ready stance.