People have the right to complain to governments

FENG YONGJUN, a resident in Mianyang, Southwest China's Sichuan province, had the habit of sending banderoles to local government departments praising them for their good performance, which were all accepted. Recently, however, he tried to send one to the local environmental protection bureau criticizing it for not tackling the pollution in his village. He was detained and charged with a criminal offense. Beijing Times commented:

It seems the local officials in Mianyang can only be praised, not criticized. By asking the police to detain Feng just because he sent a complaint, they have actually tried to hinder him from exercising his legal right to criticize public power.

More importantly, the local police detained him and charged him with staging an illegal public demonstration. According to the country's Criminal Law, it is illegal for people to hold a public demonstration without police approval, and if they refuse to end the demonstration when ordered to do so, the police can detain them. But this does not apply in Feng's case, as he did not hold a public demonstration, he only sent a complaint to the local bureau of environmental protection.