u/Bilbo8888 - originally from r/GenZhou
Sort of. But also not really. The “massacre” did happen ish. Outside the square that is.

if you search up this on baidu:https://www.baidu.com/s?ie=utf-8&f=8&rsv_bp=1&tn=baidu&wd=6%E6%9C%884%E5%8F%B7%E2%80%9C1989%E2%80%9D%E4%BA%8B%E4%BB%B6%20%E9%82%93%E5%B0%8F%E5%B9%B3&oq=6%25E6%259C%25884%25E5%258F%25B71989%25E4%25BA%258B%25E4%25BB%25B6%2520%25E9%2582%2593%25E5%25B0%258F%25E5%25B9%25B3&rsv_pq=e621a133000f2ad2&rsv_t=fba0DU979%2BI1arZz3MRrrCVPaNt7OOQnFysNxOYrtb%2BYHe1Un3VkDQ8mnQo&rqlang=cn&rsv_dl=tb&rsv_enter=1&rsv_btype=t&inputT=2705&rsv_sug3=37&rsv_sug2=0&rsv_sug4=3428

You will find this:http://www.huaxia.com/zt/tbgz/11-019/2431234.html

And in that you will find this: ６月３日　一个多月来极少数人在北京制造的动乱，发展成为一场反革命暴乱。驻守在北京城区周围的戒严部队奉命平息暴乱。４日凌晨，戒严部队实行清场同时进驻天安门广场，平息了这场暴乱。

This translates to

On June 3, the turmoil created by a very small number of people in Beijing for more than a month developed into a counter-revolutionary riot. Martial law forces stationed around the city were ordered to quell the riots. In the early morning of the 4th, the martial law troops cleared the site and entered Tiananmen Square to quell the riot.