Liu Xiaochuan, as the head coach of the Qi City Sandboxing training team, had few people whom he personally invited. The reason he invited Wu Li, a college student, was not only because he admired Wu Li's individual strength but also because of Yan Baili.
Yan Baili was famously known as the iron-blooded coach within the Qi City Sandboxing training team. He was strict in teaching but never secretive, treating his students as if they were his own sons—taking care of their basic needs and even spending his money to buy supplements for them. Therefore, the relationship between him and his students, who generally performed well, was also good.