It was true China having the majority of the mining power even after several issues that has arisen recently regarding the ban of bitcoin mining. Once China has got the increased number of users, but later due to some economic downfall they believed it is the bitcoin that is causing the economic collapse and began to restrict the use. Further citing the environmental pollution mining is restricted. If China hasn't contributed good during its early days bitcoin could've never grown this high.
Which means that on a large scale, China really supports crypto indirectly by utilizing what the crypto community needs (Mining Power) but if their government bans Crypto and Bitcoin it certainly only affects users and the company. China really know how to take an advantage of the situation and keep playing in the safe zone.