The patent says

First of all, if a 1 and b 1 are technical features further defined on the basis of A and B, then "including" should not be used in Claim 2 and Claim 3. "A specifically includes A 1" should be used in Claim 2 and "B specifically includes B 1" should be used in Claim 3.

In addition, whether AB is invalid or just B is invalid ultimately depends on whether right 1 is invalid and needs to be deleted. If right 1 is invalid and deleted, right 2 and right 3 are directly applied to right 1, which means that right 2 and right 3 are two parallel schemes. After deleting the permission 1,