By Yifan Wang

China has imposed penalties on 10 of the country's most popular live-streaming platforms, including those backed by internet giants Tencent Holdings Ltd. and ByteDance Ltd., partially suspending their operations in an effort to further crack down on the fast-growing industry.

ByteDance's Xigua Video, as well as the live-streaming platforms run by Bilibili Inc., HUYA Inc. and DouYu International Holdings Ltd.--all backed by Tencent--were among those singled out by the Cyberspace Administration of China in a notice posted Tuesday.

NetEase CC, a live-streaming app of the mobile-game developer that recently went public in Hong Kong, and Baidu Inc.'s Quanmin were also among those named.

These platforms have allowed vulgar and otherwise problematic content to circulate, the regulator said after investigating 31 companies in the industry.

The apps will be subject to penalties ranging from halting some content updates and new-user registrations to blacklisting some livestreamers who have violated regulations, the administration said.

Chinese authorities have been tightening curbs on the live-streaming industry, as the market has expanded rapidly in recent years.

Last month, China banned more than 50 hosts from live-streaming for five years. In January, reports of a potential prohibition of lucky-draw features during live-streaming sent the sector's stocks tumbling. 



  Write to Yifan Wang at yifan.wang@wsj.com