On August 2, the referee appointments for CSL Round 21 were announced.
CSL Round 21 Referee Appointments: Zhang Lei to Officiate Taishan vs. Port; Ma Ning to Serve as VAR for Sanzhen vs. Xin Pengcheng. Author：Sports UEFA.Please indicate the source when reproduced：https://www.sportsuefa.com/football-world/csl-round-21-referee-appointments-zhang-lei-to-officiate-taishan-vs-port-ma-ning-to-serve-as-var-for-sanzhen-vs-xin-pengcheng.html
