Enter China from Taiwan

Hello! I was wondering if I can travel from Taiwan to China (using a Belgian passport which has 15 days visa free entry I believe) and then travel back to Taiwan (having multiple-entry visitor visa for Taiwan). Will I have problems in China? Will I have problems getting the 90 day visa-free entry after my multiple entry visa ends for Taiwan?

I don't think so but I just want to hear if there are any sources that could help me with this. tyty :)