How can 30 teams lose their owners at the same time?

First of all, consider how many matches you can play every day, how many referees, and how many matches your staff and time can allow. You can refer to the ball game methods of the World Cup or the Olympic Games. Personal suggestion: 1. Divide 30 teams into 6 groups, 5 teams in each group will play round robin, and the group will be the first to qualify. So there are 60 games in the first round. 2. The remaining six teams were eliminated, and the two teams had a bye in the first round, ***5 games. There is another way: divide 30 teams into 4 groups: 8, 8, 7, 7 or 8, 8, 8, 6, and draw lots directly, and then the remaining 4 teams can play round robin, which will make the queue much less and easier, that is, draw lots twice.