Thank you for your detailed reply Ms. Linda.

Does this mean, my son will come here in China under a tourist visa first, and then we'll process his residence permit within 30 days of his arrival in Shenzhen?

I also would like to ask if there is a possibility that my mother can also come to Shenzhen under the same process - to take care of my son while me and my husband works full time.

Thank you in advance.