1, poor grade: ATP250 is an international tour, between the challenge and ATP500. ATP500 is an international tour with 500 championship points, which is higher than ATP250. ATP 1000 event refers to the World Nine-Station Masters, which is the highest-level tour.

2. integral difference: the winner of ATP250 will get 250 points, which is a lower reward for the players. The champion of ATP500 event will get 500 points, which is higher than that of ATP250 event, which is an important plus item for players. The winner of ATP 1000 will get 1000 points, which is one of the most rewarding tournaments and a very important source of points for players.