Letter of Invitation/my son is working in Beijing. We are applying for an L to visit him.

Hi, the correct type should be S2, the following documents are required:
1. An invitation letter issued by him which contains:
a) Information on the applicant (full name, gender, date of birth, etc.)
b) Information on the visit (purpose of visit, arrival and departure dates, place(s) to be visited, relations between the applicant and the inviting individual, financial source for expenditures, etc.)
c) Information on the inviting individual (name, contact telephone number, address, signature, etc.)

2. A photocopy of his passport and residence permit
3. Photocopy his birth certificate.