Distance rule of Chinese eight-ball free play: the free ball in Chinese eight-ball is equivalent to the BallinHand in American billiards, that is, when one side fouls, the other side can put the main ball anywhere on the table and start hitting the ball.
Free kick behind the line: if the player fouls when kicking off (such as the main ball falling into the bag or flying off the table, etc.). ), the player who gets a free kick can only put the main ball behind the kick-off line and hit the target ball between the kick-off line and the top edge.
Judgment method of free ball: after a stroke accompanied by a foul, when the opponent can't hit the main ball because of the obstruction of the non-live ball so that it can pass through both sides of at least one live ball in a straight line at the same time, it is judged as a free ball.