An example outside of China: Venezuela's Maduro, paying attention to international sensibilities, now classifies opposition to him and his government as "hate speech".
https://hosted.ap.org/article/8b39037f0c71478784778e4dcc8bb4...
how many mass shootings china had last year? oh wait
how about all those bombs dropped daily in the middle east? ah ooos sorry, america again.
USA USA USA
With that said I have no disagreement about the hypocrisy of USA bombing foreign countries.
As for shooting, how would we know if this happened in China since the government does control the media there. They could suppress anything they reflected negatively.
If you go high enough, you might get personal attention from the regional or even provincial governors, who also have to make sure they have enough food, water, shelter, jobs, and prisons to fit the population of their jurisdiction.
China has literally just banned the word 'disagree'.
https://www.hongkongfp.com/2018/02/27/china-drowns-critics-l...
Even this two-term was just a speed bump to be repealed quickly if convenient by a rubber stamp congress.
For example, China's constitution also contains "Article 35. Citizens of the People's Republic of China enjoy freedom of speech, of the press, of assembly, of association, of procession and of demonstration."
However various words and phrases to even mention Article 35 itself are banned in some chat apps, etc... in China even though the full text of the constitution is available anyways.