Chinese regulators ordered ByteDance to temporarily suspend downloads of its nascent Slack-style office app after discovering content from banned sites like Facebook and Twitter, dealing a blow to the start-up’s broader internet ambitions. The Cyberspace Administration of China (CAC) informed TikTok’s owner to take down its Feishu office collaboration tool from major domestic app stores for about a month, people familiar with the matter said. That was punishment for a feature that allowed users to browse posts from foreign platforms via a newsfeed function, the people said, asking not to be named because the decision has not been made public. It is unclear when the actual takedown will ensue, they added. The decision deals a blow to ByteDance’s ambitions while casting an unwanted spotlight on Feishu, which became popular during the pandemic as a work-from-home alternative. Feishu was intended to spearhead a foray into China’s enterprise software market, which has skyrocketed since Covid-19 pushed millions of workers out of offices. ByteDance said to plan Google-like office tools Feishu – a mash-up of Slack, Skype and Google Docs – competes in China against similar offerings from Alibaba Group Holding and Tencent Holdings. DingTalk was the most downloaded free app on China’s iOS App Store for weeks during the nationwide lockdown. Alibaba is the parent company of the South China Morning Post . Feishu’s twin app for users outside China, called Lark, is operating as normal and targeted at markets including Japan and Singapore. ByteDance declined to comment, and the CAC did not immediately respond to faxed and messaged requests for comment. Staying on censors’ good side is key to the longer-term success of Chinese internet firms like ByteDance, the world’s most valuable start-up. Beijing rigidly polices its online sphere, seeking to scrub content it considers a threat to social stability. In 2018, ByteDance had to shut popular jokes app Neihan Duanzi after regulators complained about vulgar and improper content. In a similar vein this month, regulators ordered Baidu to suspend several news channels on its flagship search app. Coronavirus forces world’s largest work-from-home experiment ByteDance removed the Feishu newsfeed function in question last month after regulators first raised concerns about the sensitive content it enabled, the people said. That feature came as part of Feishu’s Workstation platform, they said, which helps businesses manage everything from paychecks to travel and leave approvals. But the action failed to stave off the regulatory clampdown, they said. This week, the start-up rolled out a pared-down version of Feishu without Workstation, hoping to continue capturing new downloads during the absence of its main app. Feishu Lite still offers key features from group chats and online document management to videoconferencing. The regulatory blunder could disrupt the expansion of ByteDance’s fledgling enterprise wing, which has a team of more than 1,700 people and will add more as part of a global hiring spree . The unit is preparing to roll out a Google-like suite of office tools spun out from Feishu, Bloomberg News reported in March.