It is extremely risky to do short transfers within China. If you can't use the e-gates, dont even think about it. Even if you can, you'll need to go to the check-in counter to get your boarding pass. It would involve a mad dash to immigration then check-in then security. Security isnt that efficeint at XMN airport. They'll look at your BP a few times during the process and are quite detailed oriented. 90 mins is probable but I won't go for it.

It is not as bad as a b2b though which only gives you 60 minutes and will require a staff escort.