Thanks for your reply 
I see.actually I am planning to design a community user growth level, but only 5 levels( TL0-4)seems to be unable to meet our needs.
For example, I wanna add the fifth to the eighth growth level (TL0-8) and set some rules for users to continue to complete the level. In this way, the difficulty of reaching each level will be reduced, and users’ confidence and sense of accomplishment will be improved. They also stay in the community longer.
Not sure if this need is reasonable and achievable?