municipality urban area metropolitan area megalopolis
Megalopolises in China
https://en.wikipedia.org/wiki/Megalopolises_in_China
Megalopolis worldwide https://en.wikipedia.org/wiki/Megalopolis
spreadsheet megapolis in china https://docs.google.com/spreadsheets/d/1yipBFt1ttGIZIiBwGMu3XAhUDbjf3LSukrp1GCvsosI/edit#gid=505644874
https://www.history.com/news/first-earliest-human-civilizations
Mesopotamia 4000 BCE Egypt 3100 BCE India 3300 BCE China 2000 BCE Peru 1200 BCE Mesoamerica 1200 BCE