Ask for 14 badminton championship system.

Look at the level of personnel in your company. Usually I don't practice for fun. I suggest that we can have fun in order to let everyone play ball. Men's knockout can draw lots, 2 1 minute, a game to decide the outcome, 1 1 minute to exchange venues. The winner will enter the "elite group" and the loser will enter the "ordinary group". After one round, the lottery will take about 1 hour. There are 7 men and 5 women in the elite group and 7 men and 5 women in the ordinary group. In the second round, the men's elite group was divided into two groups by lottery, one with three people and the other with four people. A round of 2 1 decides the winner, selects the top two to qualify, and then draws lots to eliminate them. Elite women are directly assigned to 1, 2, 3. Five hours must be enough.