Is there a rule on the serving posture of table tennis?

1. Choice of serving, receiving and positioning

(1) Select service, service and this side. The strength of which side should be decided by drawing lots. The winner can choose to serve or receive the service first, or he can choose to be on the side first;

(2) When a player of one side chooses to serve or receive the service first, or after one side, the player of the other side should have another choice.

(3) After each score of 2 points, the receiver becomes the server, and so on, until the end of the game, or until the scores of both sides reach 10, or the rotation service method is implemented. At this time, the order of serving and receiving remains unchanged, but each person only serves one point in turn;

(4) In the first game of doubles, the server determines the first server, and then the receiver determines the first receiver. In the following game, after the first server is determined, the first receiver should be the player who served for him in the previous game.

(5) In doubles, every time the service is changed, the front server will become a server, and the partner of the front server will become a server;

(6) The player who serves first in one game should receive the service first in the next game. In the final game of doubles, when one side wins 10 first, the receiver will exchange the order of receiving the service;

(7) In one game, one player in one direction will change to another direction in the next game. In the deciding game, if one side wins 10 first, the two sides will exchange positions;

2. Legal services

(1) When serving, the ball should be placed on the palm that does not hold the racket, and the palm should be open and flat. The ball should be static, behind the end line of the server and above the horizontal plane of the playing surface;

(2) The server must throw the ball up almost vertically by hand, and must not make the ball rotate, and make the ball rise not less than16 cm after leaving the palm of his hand without clapping his hands;

(3) When the ball falls from the highest point of throwing, the server can hit the ball, so that the ball first touches its own table, then crosses or bypasses the net, and then touches the table of the receiver. In doubles, the ball should touch the right half of the server and the receiver successively;

(4) From the last moment when the ball is still before pitching to hitting the ball, the ball and racket should be above the level of the table;

(5) When hitting the ball, the ball should be behind the end line of the server, but it should not exceed the farthest part of the server's body from the end line (except the arm, head or leg);

(6) When an athlete serves, he has the responsibility to let the referee or the assistant referee see whether he serves according to the statutory provisions;

(7) If the referee doubts the correctness of a serve of the server, and neither he nor the assistant referee can determine that the serve is illegal, when this phenomenon first appears in a game, the referee can warn the server not to score points;

(8) In the same game, if the correctness of the player's serve is questioned again, whether for the same reason or not, he will lose a point without warning;

(9) No matter whether it is the first time or at any time, as long as the server obviously fails to serve according to the legal provisions, one point will be deducted without warning;

(10) When an athlete can't strictly abide by some provisions of the statutory service due to physical injury, the referee may make a decision to waive the execution, but he must explain it to the referee before the game;