Disregarding the fact that Facebook is blocked by the Great Firewall, and virtually unused in China, serving internet ads on a national or township basis is eas

Disregarding the fact that Facebook is blocked by the Great Firewall, and virtually unused in China, serving internet ads on a national or township basis is easy to do with IP address based selection. This can be done without tracking users (recording information about them) or otherwise impacting their privacy. It isn't necessary to build a database tying individual identities to nationalities or addresses, to geographically target ads.