Abstract: The Table Tennis Review (TTR) system has been officially applied to table tennis matches since December 2019 and it will be put into use in the Tokyo 2020 Olympics. At present, Chinese table tennis players, coaches and umpires have not understood the TTR system well, which will pose a huge challenge to the national table tennis team's preparations for the Tokyo Olympics. This article analyzes the working principle, application range and impact on table tennis matches as well as makes a comparison between the system and umpires' penalty, in order to develop reasonable and effective coping strategies for Chinese table tennis team to prepare for the Tokyo Olympics. Conclusions TTR system can make the "edge" and "net" penalty more accurate; the penalty on the serve is more severe and stricter; the introduction of TTR system improves the enjoyment of matches. The players' challenge to TTR means that they have doubts about the referee's decision. The audience's guessing and waiting for the final result of the round are drawn onto the screen display in the stadium, which improves the participation of spectators and the enjoyment of matches. Meanwhile the introduction of TTR system may become a tactic for players to interrupt a match, delay the match, relieve the situation on the field, and also affect the continuity of matches. The use of TTR system is a revolutionary change for table tennis competition, which puts forward higher requirements for players' legal serve, and players' serve will have stricter penalty decisions in terms of height, angle and whether to block.

Key words: serve, Table tennis review, penalty, preparation for the Tokyo Olympics, techniques and tactics