翻墻 [fān qiáng] v. To climb over a wall. This Internet slang term means to climb over the Great Firewall of China, a censorship and surveillance project that blocks potentially unfavorable incoming data from foreign countries. The purpose is to access blocked overseas websites.
墻內 [qiáng nèi] adj. On this side of the wall. This Internet slang term refers to the Internet environment affected by the Great Firewall.
墻外 [qiáng wài] adj. On the other side of the wall. This Internet slang term refers to the Internet environment unaffected by the Great Firewall.