China’s Cyberspace Administration has met with representatives from 10 companies that run social media or self-publishing platforms, including Baidu, Sina, and NetEase, demanding an immediate cleanup of “problematic accounts,” the regulator announced Friday.

The activities that could land an account on this blacklist range from “fabricating rumors” to publishing “vulgar” or “pornographic” content, according to Xinhua. The meeting, which took place Wednesday, followed a separate smaller meeting between the internet authority and Tencent and Sina, which run China’s most popular social media apps WeChat and Weibo respectively.

China recently launched its latest crackdown on social media, which has already seen more than 9,000 “self-media” accounts deleted since mid-October.

The cyberspace authority reiterated that social media platforms have an “unshirkable responsibility” to curb “self-media chaos."