In view of the changes in the World Cup system in 2026, discuss the conditions for meaningless matches and determine how many teams can get into the second round. In establishing the three-loss system, the optimal game order of three and six teams in each group was selected, and the mean value of meaningless games in each group was simulated. The final choice of the competition system is: 3 teams in each group. Each group score 1 point to advance to the next round.