How can you view Facebook on an android mobile in China?

The easiest way to check your Facebook from China is to use VPN applications. Although the main feature of VPN is security, it could unblock websites and bypass internet restrictions including Facebook, Twitter and so on.
With respect to your question, try Betternet.

Betternet is a free forever VPN service around the world. You can use it without paying even a cent. In addition to android app, Betternet is available for iOS, Chrome and Firefox.

You can get on Facebook in China on your mobile, computer or any other device (such as an iPad, etc) using a vpn or a proxy.