Second, each group will play a single round robin, with two wins in three games, the winner will get 2 points, the loser will get 0 points, and each group will be the top 2;
3. Eight teams were eliminated, winning two out of five games, with the first group winning against the second group, and the second group winning against the second group; And so on, decide the top four;
Fourth, according to the order of the upper and lower half, four teams cross the array and decide the top two by using two wins in five games;
The winners of the fifth and fourth place finally won the championship and runner-up, and the two losers tied for the third place.