Where is the restricted area in basketball?

The basketball penalty area is in the three-second zone. The three-second limit is for the offensive team in the game. That is, when a team controls the ball on the court and the game clock is running, the team’s Players must not stay in the opponent's restricted area for more than 3 seconds.

The 3-second zone is an area drawn from the court ground (note that it is the ground, why you should pay attention to it, I will break it down later) in order to limit the offensive player from staying in a favorable offensive position for too long. In this area, when the offensive team starts to control the ball, any offensive player should not stay for more than 3 seconds, otherwise it will be deemed as unfair offensive behavior of the defensive team and will be whistled. The specific penalty is: During the transition between offense and defense, an offensive player who remains in the 3-second zone for longer than the time will be counted as a turnover, not a foul.