Draw lots to decide grouping and confrontation
12 teams are a1a3a4a5 a6b1b2b3b4b5b6 respectively.
Group A and Group B play on a court respectively.
Timetable:
1 and A 1-A6 A2-A5 A3-A4 B groups are the same as group a.
2. Group A1-A4A2-A3A5-A6B is the same as Group A..
3. Group A1-A2A3-A5A4-A6B is the same as Group A..
4. Group A1-A3A2-A6A4-A5B is the same as Group A..
5. Group A1-A5A2-A4A3-A6B is the same as Group A..
The top four in each group were marked as c 1 C2 C3 C4 d 1 2d 3d 4d respectively.
Eliminate matching c1-d4c2-d3c3-d2c4-d1
Then both the rematch and the final can be done.