On November 29, last year, Joong-Won Cho made an extreme choice in the dormitory of Busan Gyeongnam Horse Racing Park, leaving three chapters. This is not the first time the rider has passed away at Busan Gyeongnam Racing Park.

Since 2005, four jockeys and three horse managers have left the world. Why did seven people make an extreme choice at a workplace? I found the clue of death in the note left by Moon.

The note left by Mun Joong-won's jockey contained an improper instruction by a teaching assistant (a position that acts as a coach for a race). In addition, allegations such as allegations of misconduct assignments were written. Mr. Moon said the instructor ordered the horseman to "ride roughly."

If they refused, he said that there was no chance of riding or riding a horse that was injured. Jockey and his assistant are private contractors with the horses. If he didn't follow the assistant's words, Moon said, it was difficult to earn a living if he couldn't compete in the game and won the prize.

Mr. Moon, who refused the teacher's improper instructions, challenged the teacher's test.

In May 2015, he was the youngest to receive a teaching assistant certificate. However, he was hungry for more than four years, falling off from the screening assignment. After the announcement, there were rumors that a teacher who was acquainted with the horsemaster would be assigned.

In this week's 'New Story', we covered in depth the reasons why jockeys and horse managers made extreme choices at Busan Gyeongnam Racing Park, what is happening at the Busan Racecourse, and what the so-called 'advanced horse racing' says.

(Reporting: Lee Jung Kook / Video: Yoon Taek / Author: Lee Eun Ju, Kim Seol)