Personal appearance is required for those who are 16-21 years old, your son is not required to appear in the embassy, your aunt is not required to appear in the embassy if you submit visa application for them. The requirements for them to get a tourist visa are:
1. Applicant's passport with blank pages and at least 6 months validity left before expiration.

2. A truly and completely filled application form affixed with one passport-size or 2x2 colored photo

3. A copy of the round-trip plane ticket

4. Hotel reservation / invitation letter with a copy of the inviter's valid chinese residence visa and passport information page of inviter's or Chinese national identity card.

5. Previously used China visa in old or new passport (Only visa stickers will be accepted. Those with stamped visas must submit additional documents for first time China visa applicants. Please refer to the list below.)

6. For first time applicants to China (Philippine passport holders, 18 years old and above), they are required to provide the following:
a) original NBI clearance valid for travel abroad

b) original bank certificate with receipt or original passbook, updated within the month that you are applying or....
- If an individual will sponsor the trip, provide his bank certificate, sponsorship and invitation letter, copy of sponsor's valid residence visa and passport information page or Chinese national ID.

c) for employed persons, also provide an employment certificate, company ID, SSS ID and contributions, TIN ID and latest ITR

7. The emergency contact information page in the applicant's passport should be filled out and photocopied.