Draw lots for the basketball game.

The draw was divided into two groups, with six teams in each group. Complete one-on-one confrontation with all teams in this group in two venues respectively (each group has * * * 15 games, and the group match has five games for each team, one game a day and five days). Win three points without losing points. After fifteen games, the top two in the group decided. On the sixth day, the first place in group A played against the second place in group B, and the second place in group A played against the first place in group B. The winner decided the champion on the seventh day, and the loser decided the third and fourth places on the seventh day. Other teams are ranked according to the results of the group stage. Group a (a, b, c, d, e, f) and group b (A 1, B 1, C 1, D 1, E 1, F 1) Day 2: A to C, B to F, D to E. Day 3: A to D, B to E, C to F. Day 4: A to E, B to C, D to F. Day 5: A to F, B to D, C to E. Like Group B, there is a group match every day.