Pingyuan Street in Yunnan Province, which the Ministry of Public Security focuses on, is a well-known drug hiding and selling center in China. From 1979 to 1988, Wenshan Prefecture in Yunnan Province was classified as a war zone because of the border war, and the construction of grass-roots political power here was stagnant, especially in the plain areas, which caused paralysis in the construction of grass-roots political power at all levels.

Pingyuan Street is a deformed and prosperous town inhabited by Hui people. In the local area, many people are involved in gun and drug trafficking activities, making the plain a paradise for criminals in this country and one of the distribution centers of drugs in this country. It is also an underground black market for guns and ammunition and a black den for selling smuggled cars.

Because Pingyuan Street is the only way for the front line of Laoshan Mountain in Malipo, Wenshan Prefecture on the Sino-Vietnamese border, during the Sino-Vietnamese border war, arms and materials were the only way. Local Muslims robbed and stole many weapons and military supplies. With a gun in your hand, you have the confidence to sell drugs. Drug trafficking is closely related to the smuggling of weapons from Southeast Asia.