All you saw were peaceful photos of the Square with Mao looking lovingly down. Not a single dead body...not a single bloody body...not a single crowd holding up a cardboard likeness of the Statue of Liberty.
China has no problem interfering with the internet.
I took a picture of a large bridge construction project in Laos over the Mekong River. It was a China Railway bridge and it was a Chinese contractor.
I pisted the picture on Facebook and 30 minutes later it was removed.