I am a South African Citizen and I want to go to China from Seoul on the 31st of January, returning on the 1st of February.
I only have a tourist visa for Korea, so I need to leave every 3 months just so that I can get a re-entry visa into the country . I am studying at a meditation center and wish to stay longer.

The Travel Agent says that I need a Registration Number ( as well as my passport and 1 photo) to apply for a Chinese Visa? I did not need a Registration Number when I went to Beijing 6 monhts ago. Do I really need that? If yes, how can I get that number? I would appreciate your help.
Thank you.
mariejo