Addition to my previous question

I just wanted to add that I am not applying to extend my overall period of stay in China which remains the same as before. Of my 5 months visa, I have spent only one month. But I want to make it multiple entry because I want to make short visits to other countries with my son and come back to China on my S2. Is that possible according to the rules from the local PSB? Thanks a lot and sorry for having to clarify my previous question