These actions can all be traced back to China's increased tendency towards authoritarianism, for example the elimination of the term limit for Xi Jinping in 2018,[1] which stands in contrast to China's economic liberalization in the early 1990s.[2] It's important to understand that this liberalization is more or less the sole reason China is the "young superpower" we see today (just look up the GDP numbers from 1990 onwards), so the question is how a reversal of this attitude will serve future Chinese interests. Although unconfirmed, there are claims that Xi's grip on power may be decreasing somewhat, and that there is "widespread opposition" from within the party, but for obvious reasons few are willing to speak out.[3]
[1]: https://www.nytimes.com/2018/02/25/world/asia/china-xi-jinpi...
[2]: https://en.wikipedia.org/wiki/Chinese_economic_reform
[3]: https://www.theguardian.com/world/2020/aug/18/china-xi-jinpi...