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
The title of the post is "massacre... fabricated by US". Not some details about massacre. Not location of deaths fabricated. The post reads as though you're claiming the whole thing was fabricated.
For me, I don't think it makes a difference if hundreds of people were killed inside or outside the square.