How to group the world cup quarter-finals?

The grouping principle of the world cup quarter-finals: after drawing lots by groups, each group will be numbered, and after the top two teams qualify, each team will be numbered. Abcd is the upper half, efgh is the lower half, and the top eight are generally A 1-B2 and B 1-A2. Then the quarter-finals will be produced, and bcadfgeh's reserve team will play against each other to produce the quarter-finals.

World Cup Competition System: The World Cup schedule is divided into two stages: the qualifying stage and the final stage. The two stages of the World Cup are divided into six competition areas, namely Europe, South America, Asia, Africa, North America and Oceania. Each division needs to formulate qualifying rules according to the actual situation of the division, while teams from FIFA member countries (regions) who sign up for the World Cup need to qualify in the division to compete for seats in the World Cup finals.