grouped under A, B, C (with reference to their past records) ....... each group will have 4 to 6 players, round robin system is used for this phase.
For Phase 2, the bottom half of the higher group will play with the top half of the lower group, i.e. round robin system is used for this phase but Phase 1 results are carried forward to this phase.
Phase 3 (擂台赛) will be scheduled for those so call "unexpected" player(s) if any.
Histories of previous individual events as below :