What does it mean for a countryman to walk out of Guangdong?

Rural people leave their hometown for big cities.

The theory of "villagers leaving Guangdong" is a summary of the phenomenon of large-scale migration (millions of people) from rural areas in southern China to cities (a few cities such as the Pearl River Delta) in modern times, commonly known as "millions of immigrants", "multi-millionaire small bosses" and "millions of wage earners". "Going out of Guangdong" means leaving Guangdong (referring to Guangdong Province) and seeking development in first-tier cities such as Shenzhen and Guangzhou.