To some extent, China certainly controls part of the bitcoin market. At least because most of the bitcoins are mined there. However, as far as we all know, the market is extremely volatile, and China, in turn, is not the only giant that owns volumes sufficient for any manipulation. Therefore, China, although it has some weight, but it is far from decisive.
Agree, with a number of users and miners who are constantly mining and making money from bitcoin in China, Chinese control is relative to bitcoin but as you said, they can be strong and they can make an impact but other countries are not decorative products, users and miners in other countries will also not lack, and of course, they do not want to be under Chinese control, this dependence is not in the best interest. Almost large users and whales of all nations will unify and link together to control bitcoin, create balance and contentment for all