Is Chun Wu an overseas immigrant from China?

I don't quite understand your understanding of overseas immigrants in China! Chun Wu is defined as overseas Chinese at most. He was born in Brunei and has Brunei nationality. He is a standard Brunei. He is an overseas Chinese because his grandfather was from Fujian, that is, his grandfather's generation immigrated to Brunei and settled in Brunei. It can be said that his grandfather was an immigrant, but by his generation he should be a complete Brunei.