A social media account for popular Chinese e-commerce app Xiaohongshu has been blocked on Monday after it issued a post on the anniversary of the 1989 Tiananmen Square crackdown.
It had posted "Tell me loudly: what's the date today?" on microblogging platform Weibo.The post to its 14 million followers was swiftly deleted.
Its Weibo page has been replaced by a message saying it is being investigated for violations of laws and regulations.
Xiaohongshu has yet to comment publicly on the matter.
Xiaohongshu, backed by Chinese internet giants Alibaba and Tencent, has been described as China's Instagram with e-commerce and is mostly used by young, urban Chinese women.
It shares the same name in Chinese - Little Red Book - as the famous book of quotations by Mao Zedong, the father of Communist China.