The Beijing subsidiary of the Cyberspace Administration of China (CAC) said it had issued rectification orders for problems ranging from broadcast content, to usernames to shared content, Xinhua news agency reported.
Among those closed are inke.com, huajiao.com, xiaomi.cn, imifun.com, lehaitv.com, kuaishou.com, and zaizhibo.com.
"The Clean the Web" was first launched in 2014 to manage obscene and illegal content online. The campaign involves checks on websites, search engines, mobile application stores, Internet TV USB sticks and set-top boxes.
CAC Beijing said some live-broadcast websites were found to be hosting or streaming vulgar, pornographic and illegal content.
The office issued website administrators with orders to review security measures and their management systems, and clean up their content. Those that fail to meet the office's requirements would be "dealt seriously and severely."
