How do 22 teams arrange competitions?

Every 1 1 class is divided into one group, and the ranking is obtained through single cycle, and the top 4 in each group qualify; (win 2 points, lose 1 point; The same score, first compare the relationship between the two teams. If there are more than three teams with the same score, compare the gain-loss ratio between the teams first. Ranked by score); The quarterfinals adopted the cross-match system: A 1 B4, A2/B3, A3/B2, A4/B1; You can enter the semi-finals with a single defeat or two wins in three games. The winner of A 1 pair B4 and A3/pair B2 are the top four, and the winner of A2/B3/A4/pair B 1 pair is the top four. The final will be decided by the best of one game or three games, depending on the time.