The three regions are Inner Mongolia, Guangxi, Hainan, Guizhou, Yunnan, Tibet, Gansu, Qinghai, Ningxia and Xinjiang 10 provinces (regions).
The best is Lanzhou University, but there are 34, which is definitely not good.
Look again, the best ones are Yunnan University and Hainan University. Dayun seems to be beyond your ability. Looking for Hainan University.
good luck