Errol Resek (L), a witness and participant of "Ping-Pong Diplomacy", plays a game at the commemoration with Gao Jun, a former world champion and member of China's national ping-pong team and current coach of U.S. Ping Pong Team, in Yorba Linda, California, the United States, April 10, 2019. A ceremony commemorating the 48th anniversary of "Ping-Pong Diplomacy" was held Wednesday at the Richard Nixon Presidential Library and Museum in Yorba Linda, western U.S. state of California. (Xinhua/Gao Shan)