Firefly

Firefly is an Internet circumvention tool for users inside China to access websites and apps blocked by the Great Firewall.

By default, Firefly only proxies network traffic towards non-China IP addresses, directly connecting Chinese domestic IP addresses for better performance. If you find some websites or apps not accessible, maybe the IP address is outside China and blocked by the Great Firewall, but Firefly's split tunnelling mechanism mistakenly recognize it as a Chinese domestic IP address. In that case, you can set Firefly to proxy all traffic, then try again.