Given that the majority of bitcoin processing is done in China (source: https://bitcoinmagazine.com/articles/report-links-74-bitcoin-mining-china-sees-threat-network/), is it possible for a single entity to accomplish double spending (or be forced into accomplishing it by the Chinese government) to make profit for themselves or for the country?
How likely is it for all the separate entities doing the mining in China to be forced into complying and compromising the network's validity and has there ever been credible reports of such a thing occurring on bitcoin's front specifically?