What is the break between coach Zheng and coach Chen?

"Beyond" and Zheng used to be good friends, but when they competed for the national team quota, they were jealous that Zheng was more talented than themselves and did some disgraceful little moves, which led to the deterioration of their relationship.

Zheng and Jiang Hong have been training together since they were teenagers. All three people love short track speed skating, but only the first place can enter the national team.

In order to compete for the first place, Jiang Hong injured her leg in training and ended her sports career. Later, Zheng He entered the national team and was assigned to the provincial team. The relationship between the two people broke up because of various misunderstandings.