16 in the last game, the team was divided into 8 groups, and the two teams played home and away games. The promotion conditions are calculated according to the total score of two rounds. If they are equal, those who score more goals away from home will advance. If everything is the same before, overtime will be played for 30 minutes. If the game is tied by the silver ball system, there will be a penalty shootout and so on. In the end, the two teams chose a neutral venue for the final, and the rules were the same as those of the knockout.