The following items must be submitted to obtain a visa:
A) A valid passport
B) A completed visa application (ms-word) (pdf)
C) A recent photo(2"x2" color)
D) Document verifying the purpose of his/her visit to Korea, such as return flight ticket, hotel booking, itinerary
E) Temporary Residence Permit in China and its copy
You have to find a travel agency apponited by korean embassy or consulate in China to apply for it, where do you study in China? different travel agencies are authorized in different places.