How do seven teams decide the championship in ten games? There can be a penalty shootout!

1) Seven teams played ABCDEFG, A and B, C and D respectively, and the winner advanced; By counting the number of single round robin and goal difference, team 3 will advance to the top two. In the end, the remaining four teams played two semi-finals and 1 final, which happened to be 10 to decide the outcome.

Does it have to be 10? If we can have another game, there is another plan:

2) The draw is divided into two groups, Group A, 4 teams, Group B, 3 teams ... single round robin, 4 teams, 6 games, 3 teams, 3 games. Then the first place in Group A goes straight to the final, and the second place in Group A and the first place in Group B compete for the final qualification. Group A's first match was 3+ 1, Group B's first match was 2+1+(entering the final), and Group A's second match was 3+ 1+ 1 (entering the final). The second place in Group A suffered a slight loss, but it was also because of poor performance in the group stage. Reasonable time arrangement should be fair.

PS: One more game. The previous scheme can add three or four finalists.