Why don't Dongchuan people admit that they are from Kunming?

Because Dongchuan used to be a municipality directly under the Central Government of Yunnan Province. Dongchuan was once a very important city in Yunnan, famous for its rich mineral resources. Later, the mineral resources in Dongchuan became less and less, and the population of this city also dropped sharply. Later, Yunnan Province promulgated a new policy, and Dongchuan was abolished as a municipality directly under the Central Government and turned into a district of Kunming. After Dongchuan lost its mining capacity, its economy plummeted, resulting in its identity being revoked. The citizens of Dongchuan became Kunming people.