China has seen the success of bitcoin of which it can try to replicate this success by using it's technology to introduce a centralized cryptocurrency by taking the first step of banning BTC. And knowing China's desire to become the #1 super power in the world, entering the digital currency industry is one way of being #1. So China's move to ban btc is nothing less than depriving its people the financial freedom and also protecting its revenue collection avenues.
It's absolutely true as you said, the Chinese government has robbed its people of financial freedom, China's goal is to ban bitcoin because they can't control digital currency, because the system implemented by the Chinese government is that they want to control everything, they want to be seen as a country that has everything in its place. other countries, actually they know crypto currency can make the economy of the people better, but they don't want to accept crypto currency operating in their country because the government can't control crypto currency.