Each game is divided into two and a half hours for a total of 4 quarters of 12 minutes each. Extra time is 5 minutes.

Take a 130-second break between the first and second, third and fourth quarters. Take a 15-minute break between halves. Take a 100-second break between the 4th quarter and overtime and between any overtime.

During the last minute of the first, second, and third quarters, the game clock shall be stopped after a successful shot. During the fourth quarter and the last two minutes of overtime, the game clock shall be stopped after a successful shot.

2. Team

During the competition, each team shall consist of 5 players, and the number of players on the field shall not be less than 5.

If a player commits a sixth offensive foul and the team no longer has an eligible substitute, the player shall remain on the court and shall register one offensive foul and a team foul; A technical foul will also be awarded to the team. All subsequent offensive fouls (including offensive fouls) shall be dealt with in the same way.

If there are only 5 qualified players, one of whom is injured and must be removed or ejected, he shall be replaced by the last player who has been disqualified for 6 offensive fouls. Each time an injured or ejected player needs to be replaced, the order of reversal shall be followed. Any disqualified player who re-enters the game shall be awarded a technical foul.

3. The game begins

The first quarter of the game and overtime shall begin with a self-jumping ball in the middle.

The second and third quarters shall begin with the team that loses possession after kick-off in the first quarter throw-in at the end line.

The fourth quarter shall begin with a throw-in from the end line by the team that has gained possession of the ball after the kick-off of the first quarter.

4. Dead balls, live balls, pressure balls

The ball is dead when the following happens:

Scrums;

The ball stays on the basket or gets stuck between the hoop and the rebound;

At the end of any session; free throws for technical fouls;

offensive fouls (boxing fouls, non-match fouls);

the first of multiple free throws;

on-field offences (dribbling, 3 seconds, 10 seconds, 24 seconds, etc.);

Fight fouls;

an omission whistle;

After a successful shot or free throw;

Before a player takes possession of a boundary.

The ball is a live ball in the following situations: in any jump ball, when the referee throws the ball; When a throw-in player can handle the ball; When the penalty player can handle the ball.

The ball becomes a vitality ball when it is legally slapped by a jumper; when the ball leaves the throw-in's hand; When the ball leaves the penalty kicker's hand.

5. Replacement

The substitute should report to the recorder the name and number of his and the substitute player and be in the substitution area in front of the recording desk. Failure to report to the recorder is subject to a fine of $25. The recorder shall blow the whistle to announce the substitution when the ball is dead (except after a successful shot) and the substitute player must be waved by the referee to enter the game. The time to replace a disqualified player is 30 seconds.

After the first free throw of multiple free throws, the substitute is allowed to enter the game, regardless of whether the free throw is made or not.

Substitutes may not replace the penalty taker or jumper unless the injured player requests to be replaced, in which case the opposing coach shall select the substitute on the bench of the team on the side of the penalty (jump). Injured players will not be able to play again. Substitutes must remain on the pitch once they enter the game and are not allowed to be substituted until the next dead ball.

If a player is injured by unsportsmanlike conduct and the penalty cannot be taken, his coach may designate any qualified member of the team to take the free throw. Injured players can also play again.

6. Pause

(l) 20-second pause

Each team has the right to request a 20-second timeout every half hour. A total of two 20-second timeouts may be requested per game (including overtime).

A player requests a 20-second timeout, which is given only when the ball is dead or the team is in control of the ball. The team member shouts: "20 seconds timeout".

During the 20-second timeout, the team can only make one substitution. If the team requesting a timeout replaces a player, the opposing team may also replace a player.

If a second 20-second time-out is requested in the middle of the hour (including overtime), it shall be allowed, subject to the registration of a regular time-out.

If the game cannot continue at the end of the 20 seconds, a regular timeout should also be registered.

(2) Regular timeout (100 seconds)

Each team has the right to request a regular suspension of 7 secondary registrations. Each team is limited to no more than 4 timeouts in the fourth quarter; No more than 3 timeouts in the last two minutes of the fourth quarter. During overtime, 3 timeouts are allowed per team.

A player requests a 100-second time-out, which is given only when the ball is dead or when the team is in control of the ball. The team member shouts, "Pause".

There must be two timeouts per quarter. If no team calls a time-out with 6 minutes and 59 seconds remaining in each quarter, the recorder shall take a mandatory time-out at the first dead ball, which is registered in the name of the home team. With 2 minutes and 59 seconds remaining in each quarter, no team calls a second timeout, and the recorder shall apply a mandatory time-out at the first dead ball, which is registered in the name of the team that was not previously registered in the quarter.

Additional timeouts are permitted, subject to a technical foul. The head coach can request a 20-second or 100-second timeout when the game is aborted.

7.24 second rule

The 24-second timer will start when a team gains a new possession of the ball in a match, or when the ball is legally touched by a player on the field during a throw-in. The team with possession of the ball must shoot within 24 seconds of receiving the ball. The conditions for completing the shot are:

(1) Before the end of 24 seconds, the ball must leave the player's hand;

(2) After the ball leaves the player's hand, the ball must come into contact with the basket.

If the ball does not touch the hoop within 24 seconds, it is a 24-second violation.

Basketball is divided into fouls and violations. A player will be sent off after six fouls, and if two technical fouls have been whistled before six fouls, the player will also be sent off. When the team has accumulated four fouls in each quarter, the fifth foul will result in two free throws from the opponent. There is no blowing penalty for the offence, just the ball is handed over to the opponent

8. Fouls

(1) Offensive foul

After the ball is live, the attacking player makes illegal contact with the opponent. (That is, the defender is already standing outside the reasonable collision zone and has not moved his feet, and the offensive player knocks him down, which is an offensive foul.) Correspondingly, if a defender's footsteps move, it is a defensive foul. It's an offensive foul.

If the offensive player commits an offensive foul, if it is not an elbow foul, a boxing foul, or a malicious foul, it shall be dealt with according to the following penalties: no score shall be awarded to the attacking team; Register a foul on a player who commits an offense; Fouls committed by the team as a whole are not registered (except for the sixth foul committed by the team and the team has no eligible substitutes).

(2) Move pick-and-roll fouls

When performing a pick-and-roll tactic, the pick-and-roll player should stand still, not move his feet, and should be one position away from the defender, otherwise he will be whistled for a pick-and-roll foul

(3) Foul without the ball

Foul off the ball when both teams do not possess the ball when they have the ball and make illegal contact with each other.

Player intrusion foul. If it is not a boxing foul, a malicious foul, or an elbow foul, and neither team has possession of the ball at the time of the foul, the following penalties shall apply: one offense by the registered offending player; Register a foul on a team-wide foul; If the penalty for a team foul does not occur, the opposing team is awarded a throw-in on the touchline close to the place where the foul was committed; If a team-wide foul penalty occurs, one free throw plus one free throw is awarded to the offended player.

If a defensive team is awarded a foul without the ball and then the shot (free throw) is successful, the offended team shall be awarded a free throw, making it possible to score 3 or 4 points. This rule applies to: regardless of which offensive player is fouled; Regardless of whether the foul penalty for the whole team is present or not.

If an offensive team is given a foul without the ball, and then the offensive team member makes a successful shot, the score is not counted.

(4) Fouls by the whole team

If each team commits more than 4 fouls per quarter, and each team commits more than 3 fouls in overtime, one free throw and one free throw will be awarded.

If there are fewer than 4 team fouls in the first 10 minutes of each quarter, or less than 3 team fouls in the first 3 minutes of overtime, the team is allowed to commit one team foul in the last two minutes without penalty.

Two free throws are awarded for an offensive foul on a player who is making a shot, and no additional free throws are awarded if a foul is made for the whole team; A free throw is awarded if the shot is successful, and no additional free throw is awarded if the team fouls the whole team. That is, up to 3 points on a successful two-point shot and up to 4 points on a successful 3-point shot

9. Violations

(1) Walking: Walking more than three steps with the ball is not walking

(2) Interference ball: When the ball thrown by the opponent reaches the highest point and begins to fall, the defender touches the ball and is blown as an interference ball, and the attacking side is blown to score directly, and the ball is handed over to the defender.

(3) Three-second violation:

Defending for three seconds: If a defender stands in the three-second zone and has no offensive players at a distance of about 1 meter from the start, and he stays in the three-second zone for more than three seconds, he is considered to be defending for three seconds, and if he violates the rules twice in three seconds, he will be punished with one penalty and one execution.

Attacking for 3 seconds: If an attacking player stays in the 3-second zone for more than 3 seconds without the ball or with offensive action or intent, it will be considered as an offensive 3-second penalty and the ball will be exchanged!

(4) Five-second offence:

When a throw-in is taken, it should be sent within five seconds, otherwise it will be whistled for a violation and the ball will be handed over to the opponent

(5) Eight-second Half Off:

That is, when an attack starts, after taking the ball from the backcourt, it is necessary to dribble the ball across the half court to the front court within 8 seconds, otherwise it will occur with the ball for 8 seconds

(6) Two dribbling violations: that is, after the first dribble, holding the ball, and then starting to dribble again, it will be blown for the violation, and the ball will be called to the opponent.

(7) Wrist flip: Now the NBA blows very tightly a violation, when dribbling, it is not allowed to the vertical angle between the palm and the ground more than 90 degrees, collectively known as the wrist flip, in fact, it is similar to the blowing penalty of two dribbles, when dribbling, hold the ball with one hand, in a dribble.