This is horse shit. There are examples of protests being countered (e.g. When Trump gassed protesters and clergy members to hold a Bible up upside down at their church), but these examples are rare and those people weren’t actually “silenced”. They told everyone about what happened.
Americans have freedom of speech protected by our constitution. China, on the other hand, has actual laws dictating against many forms of speech.
For example… “The PRC bans certain content regarding independence movements in Tibet and Taiwan, the religious movement Falun Gong, democracy, the 1989 Tiananmen Square protests and massacre, Maoism, corruption, police brutality, anarchism, gossip, disparity of wealth, and food safety scandals.”
China.