The Tiananmen part you mentioned is slightly inaccurate. It is important for us to recognize that censorship has far evolved from Stalin cartoony into disseminated dilutions to control the truth. China still covers it but waters it down as “The Spring–Summer Political Turmoil of 1989” (“1989年春夏之交的政治风波”); posts that refer to it with different names are removed, but the official narrative can be perfectly searched for and appears in documentaries. After all, the best way to plug an artificial hole is to leave no gaps.

Here’s an example of how the domestic internet covers it:

In the mid-to-late 1980s, with the rapid economic development, inflation increased, corruption was serious, and social contradictions were highlighted [26]. At the turn of spring and summer in 1989, a few counter-revolutionaries based in Beijing incited riots against the Communist Party and against socialism, but under the leadership of Deng Xiaoping, they were eventually quickly put down. After that, Jiang Zemin took over as General Secretary of the Central Committee of the Communist Party of China, forming the core of the third-generation central leaders of China. In order to stabilize the economic situation and curb inflation, the Fifth Congress of the 13th Central Committee of the Communist Party of China made a decision to calm and rectify the social economy for three years.

Hopefully the problem with this description is obvious.

In spite of their efforts, you would be hard-pressed to find someone in a Chinese city who doesn’t know what the CCP is censoring on this topic, thankfully.