1, the simplest, draw lots in groups, divide into four groups, there is a group of three teams, this is the simplest, you will be very lucky when drawing lots.
2. If it is complicated, of course, it is necessary to consider whether to enter the top 8 or the top 4 after the group match. If the top four match, we can divide them into 5 groups with 3 teams in each group. The first place in the five groups is smaller than the score, and the top four will advance. Or the top 3 directly advance, and the 4 th and 5 th play-offs; It can also be divided into three groups with 5 teams in each group. The first place in each group will be promoted directly, and the second place with the best performance will also be promoted to the semi-finals. In this case, the result of the group match will be very important. If it is the top eight, it is the same.
3. If you have past competition results, you can play in the quarter-finals, that is, let the defending champion directly enter the quarter-finals, and the remaining 14 teams will play against each other, and the quarter-finals will enter the quarter-finals, just right. This is also acceptable and the schedule is simple.
That's all I can think of for the time being. I hope I can give you some reference opinions.