Why is xyg's coach called Uncle?

When you talk with Dou Xiu in your arms, it's like being hugged when you go to your uncle's house for the New Year, and being named by fans.

Coach xyg was originally named Feng Jun. When Daxian was broadcast live, there was a barrage saying that Feng Jun looked a bit like Daxian. Just call him Daxian's uncle. Daxian himself admitted this.

It is also said that Feng Jun talks to Kubo in his arms, just like a big uncle talking to his nephew, so he is called a big uncle.