It needs to be underlined, that every action taken by China aims to become an invincible country in any sector. so based on mining in China itself in 2018 there was a group of young people mining bitcoin using only a few computers, and were immediately arrested. This simple example of China has ambition without tolerance, and the rules apply to its own citizens. the Chinese government mines bitcoin for the benefit of those who don't want to be left behind in a cryptocurrency-based economy. let's say that mining in China is almost the largest mining company, and can only be managed and controlled by the Chinese government itself. if it is time they say to use it and leave mining, that means there is an end where bitcoins accumulate there.