First, because Yang Zhigang rejected Degang Guo's application for apprenticeship. While working in the Cultural Center, Degang Guo asked Yang Zhigang, the curator, to learn from him, but Yang Zhigang refused. Degang Guo's application for an apprentice shows that Yang Zhigang is more recognized, but Yang Zhigang's cold rejection is like pouring cold water on Degang Guo's head, which makes Degang Guo feel chilling. This is one of the reasons why Degang Guo is unwilling to recognize Yang Zhigang.
Second, Yang Zhigang reported Degang Guo's false invoicing, which affected the development of Degang Guo's work. Yang Zhigang decorated his home, and used the money from the cultural center to make Degang Guo make a false invoice, and reported it to Degang Guo. As a result, Degang Guo's work was adversely affected, and he could not continue to perform in the cultural center in the future. Since then, the relationship between Yang Zhigang and Degang Guo has deteriorated. This is the second reason why Degang Guo is unwilling to recognize Yang Zhigang.
Third, because Yang Zhigang did not give Degang Guo proper guidance. When asked whether Degang Guo was his apprentice, Yang Zhigang did not give a clear answer. Degang Guo won't recognize Yang Zhigang, because he didn't give Degang Guo a proper apprenticeship, his name is not standardized, and his words are not fluent. On the other hand, Yang Zhigang publicized the negative news of Degang Guo during his apprenticeship in Degang Guo, which affected the development of his crosstalk career. This is the third reason why Degang Guo is unwilling to recognize Yang Zhigang.
Fourth, because Yang Zhigang only talked about interests, not friendship, it hurt Degang Guo's heart. When Degang Guo was down and out, Yang Zhigang didn't lend a helping hand. On the contrary, he mocked Degang Guo with sarcastic remarks. "If Degang Guo leaves the cultural center, he will starve to death.". These words hurt Degang Guo like a knife. When Degang Guo was very popular, Yang Zhigang jumped out and said that Degang Guo was his former apprentice. This is in stark contrast to his refusal to learn from Degang Guo. Only look at the interests, not the friendship between master and apprentice. This is the fourth reason why Degang Guo is unwilling to recognize Yang Zhigang.
5. Because Yang Zhigang sued Degang Guo, Degang Guo's reputation was damaged. Yang Zhigang sued Degang Guo on the grounds that his reputation had been violated, just to destroy Degang Guo's reputation, and he wouldn't stop until he reached his goal. This is the fifth reason why Degang Guo is unwilling to recognize Yang Zhigang.
In a word, justice lies in people's hearts. Yang Zhigang has done a lot of harm to Degang Guo, so Degang Guo is unwilling to recognize Yang Zhigang.