20 18 how to compete among the top 40 in the preliminaries?

20 18 World Cup preliminaries will be held by drawing lots and grouping. Details are as follows.

There will be 43 AFC teams participating in the Asian regional qualifiers, with a total of 4 stages. The war will start in March next year, and the first stage of the competition will be drawn in February 10. Six teams ranked 28th to 43rd in Asia will take the lead in the first stage of the competition according to the home and away competition system, and then make up 40 teams to participate in the second stage of the Top 40. China will directly participate in the second stage of the competition, and the draw date for the top 40 will be determined on April 1 day. The second stage of the Top 40 will be divided into eight groups. The third stage is divided into two groups, with the top two in each group entering the World Cup in Russia and the third in each group participating in the fourth stage play-offs.