It doesn't make any sense. Mining is only useful in the context of decentralization. Block rewards are supposed to incentivize miners to do proof of work without regard for central authority. If the Chinese government created their own "Bitcoin" then it wouldn't need mining. And miners would be disincentivized from mining the government chain because their rewards could just be confiscated.
In any case, China is planning to release a blockchain currency similar to Tether. It will be linkable to Bank of China accounts. I guess they are hoping they can drive some of that blockchain hype right back to their dirty fiat money.