Sixty-four years ago today, on December 9, 1961 (November 2, 1961), the "Rotation Serving Law" was implemented in international table tennis competitions on a trial basis. In early December 1961, the Chinese Table Tennis Association received a notice from the International Table Tennis Federation, which instructed the member associations of the International Table Tennis Federation to adopt the "Rotation Serving Law" in any international table tennis competition from 1961 to 1962; the previous "time limit" regulations were suspended. This new regulation will further prevent table tennis players from only defending but not attacking and delaying time in the game. The explanation of the "rotational serve method" in the notice is that when a game is fifteen minutes old, the timekeeper will declare the game temporarily interrupted, and the referee shall declare that from the next ball, the game will continue according to the "rotational serve method". After the referee announces the start of the "rotational serve", the serve player must score points in twelve consecutive strokes after this, and if the twelfth stroke still fails to win, the opponent will be awarded a point. Therefore, the timekeeper does not need to time at this time, but only calculate the number of strokes the player has made. Each point is served in rotation. In this game, the winner is the first to score 21 points. In the case of each side scoring 20 points, the winner is the first to score two points after this. In each game, if there is a game in which the "rotation service method" is implemented after 15 minutes, then in each game following this game, the "rotation service method" is implemented as long as it has been 10 minutes. The regulations for the trial implementation of the "rotation service method" were adopted at the International Table Tennis Federation Congress held during the 26th World Table Tennis Championships. In order to restrict "defensive" table tennis players from only defending but not attacking in the game and delaying the game time, the International Table Tennis Federation used to adopt the "time limit" regulation, that is, each game cannot exceed 20 minutes. If the game is played for 20 minutes, the side that scores the lead at that time will be judged as the winner of the game. If one game is played for 20 minutes in each game, the following games of the game can only be played for ten minutes. When the ten minutes are played, the side that scores the lead at that time will be the winner of the game. But after the implementation of these regulations, there will still be long "marathon" battles in the game, so the International Table Tennis Federation has taken new measures this time.