The reasons are as follows. According to the query, League of Legends e-sports club in official website, Topbo, League of Legends e-sports club in official website and JD.COM.

1. Professional player Ding Zhuo (ID: Knight) signed a contract with Tao Bo Club.

2. Professional player Ding Zhuo (ID: Knight) chose to join JD.COM after friendly negotiation with JD.COM Club. Ding Zhuo (game ID: Knight), born in Pingxiang City, Jiangxi Province on May 22, 2000, is a professional player of League of Legends and plays for JDG E-sports Club.