The ChiComs will figure out a way. Slaughter a few Muslim villages, and the rest will flee over the border (which will be opened just long enough to let them out).
Alternately, the Chinese could deal with the shortage of women (caused by their "one child" policy) by redistributing all the teenage Muslim girls to Chinese husbands elsewhere in China.
There are between 22 million and 55 million Muslims in China. How many villages do you think they will have to slaughter to get the message across?