How can China B enter China A?
The top two players in the final of the China Second League are promoted to the Chinese Football League. There are two teams in a year. The Chinese Football Association China League for short is the second level professional football league organized by the Chinese Football Association and participated by domestic professional football clubs, second only to the Chinese Football Super League. The China Football League A started in 2004, formerly the China Football League A Group B League. In the first session, 17 teams participated in the promotion and demotion system. Is there anything you don't understand?