Four people were detained in northeast China and two others were lectured for posting poems that disparaged a city’s image in online chat groups, domestic media outlet Guancha.cn reported Monday.

The six individuals — all residents of Yichun in Heilongjiang province — were punished for “causing a significant negative impact on society,” according to the report, which cited an announcement from Yichun’s political and legal affairs commission dated July 18. In the announcement, city authorities warned that “anyone posting rumors (or) derogatory content shall be strictly punished under the law” and asserted that the internet is not “lawless territory.”

The content of the poems has not been disclosed. (Image: 伊春发布 on WeChat)