Why are there no locals working in factories in Guangdong? All from other provinces

For Guangdong natives, first of all, they are rich. Rich people all want to immigrate to places like Hong Kong and the United States. In addition, it is very tiring to run factories now and they don’t make much money. They are still like dozens of people. Years ago, a few decades ago, most of the people who set up factories were locals, because they made the money first and left some unprofitable business to outsiders.