South Korea in China for foreigner

Hi, I am Cambodian who lives in France with french residence permit. I am going to Guangzhou for my internship in May for 3 months from May to August. and when I finih this internship, I must go to South Korea for my study ( exchange semestre ) from the end of August to the end of december. As I leave to China in 2 weeks, I have no time to apply South Korea Visa in Korean Embassy in France. So I would like to know if it is possible to apply a south Korea Visa in Korea consulate in Guangzhou. As I am Cambodian who have french residence permit and have a Chinese F Visa for my internship.