Why are there so many Northeasters in Cangzhou?

The ethnic system in Northeast China was formed relatively late. The ethnic system in Northeast China was formed relatively late. In the northeast, most people have emigrated, and the rise of most cities in the northeast is quite modern, so many people in the northeast have emigrated to other places. Cangzhou City is a prefecture-level city in Hebei Province, located in the Heilonggang River Basin in the southeast of Hebei Province and in the east of Hebei Plain.