1, the first round: 16 teams will be divided into 8 groups, with two teams in each group, and the winning team and the losing team will enter the next round respectively.
2. The second round: The eight winning teams will be divided into two groups, and four teams in each group will compete to decide the outcome. Four winning teams and four losing teams will enter the next round.
3. Third Round: The four winning teams will be divided into two groups, and the two teams in each group will play against each other to decide the outcome. The two winning teams will enter the quarterfinals, while the two losing teams will be eliminated.
4. Round 4: Divide the two winning teams into two groups by drawing lots, and the teams in each group 1 will play against each other. The winning team of 1 will enter the final and the losing team of 1 will be eliminated.