On the first day 10 team drew lots, 6 teams took a bye, and 4 teams participated in the first round.
The next day, two teams and six teams won the first round, and eight teams participated in the second round.
On the third day, in the semi-final, four teams won in the second round.
On the fourth day, the two teams participated in the finals and semi-finals.
The replacement of 2: 1 is not recommended for girls and boys, and should be analyzed in detail. For ordinary people, the total pulling force of two girls is slightly greater than 1 boy.