According the blog China Confidential, China’s Internet monitors are becoming concerned about radical “leftist” (meaning, ultra-socialist or communist) language online. The kinds of things that might warrant special attention?
Unorthodox, repeated references to Lenin, say, or Lin Biao (Mao’s Long
March comrade-in-arms, who disappeared after a supposed coup attempt
during the Cultural Revolution but nevertheless remains an inspiration
to heretical overseas Maoists because of his theory of guerilla warfare).
(via Global Voices)