Of course the muslims will not convert. Christian 'counsellors' especially like to prey on the repeat in-out-in-out chinese idols/gods praying gangster types. Religion is the only hope for many of these convicts.
Islam is basically out of question for chinese. Taoism/folk religions cant offer any consolation. buddhism tells you it's your karma that you are in prison. Christianity tells you god loves you despite who you are, and he will forgive and love you.
The odds of conversion success are quite high. Get them hooked on this new religion drug, and your 10% is guaranteed for life!
In prison Christianity is king.
Because you get more time off to go service.
Get more goodies like chocolates.
Entertainment - Volunteers perform for you....can see chiobus too.
Moslem inmates tell me if they can also want to go church service.
I dunno why Christianity got such clout in prison. Maybe higher ups all Christians and so easily approve a lot of their activities