If China wanted to destroy bitcoin I think they could do it. Yes, they have that much juice.
It looks to me like the Chinese authorities have destroyed Bitcoin (in China) before it was invented. Seems that fewer than one in a million souls in that country have the combination of capability and mindset to employ the solution.
One Chinese I know fairly well is vehemently and viscerally opposed to Bitcoin on principle and steadfastly refuses to learn or understand anything about it. I have to hypothesis that whatever factors effect her perception are at play with a healthy percentage of the rest of the population.