US mainstream news outlets like CBS News with actual reporters on the ground at the time: https://www.cbsnews.com/news/there-was-no-tiananmen-square-massacre/
Classified US communications with assets on the ground: https://wikileaks.org/plusd/cables/89BEIJING18828_a.html
Image Analysis
When I see things like that I always like to see what kind of website this is https://en.wikipedia.org/wiki/Al_Mayadeen
It is argumentum ad hominem. Imo, doesn't matter what site is it. If the site has a bad reputation just check sources twice but do not reject the article just because the site. That's how I see it.
They also refer to the Ukrainian government as a "Nazi regime."
Your choice, but choosing to believe that site is plainly asking to be lied to. Advising others to "check sources twice" is pretty laughable in this context. This is unintelligent and blatant propaganda.