Yeah, this is too dangerous for them.
There's no way they're going to let this loose for everyone (even just in China) to poke at. They're going to need censors scrubbing the output at all times lest the Xi-bot say anything (gasp) non-Xi Jinping Thought approved. And all LLMs so far are very easy to jailbreak - there's no reason why China's would be any better, especially with most of it being 'acquired' technology. So anyone who knows what they're doing with an LLM could make Xi-bot say the funniest, most treasonous things (and the bar is very very low for treason).
Probably their best use for it is to auto-generate his usual rambling, vacuous, pronouncements on every subject under the sun for publishing, saving the real Xi a lot of work. Though he obviously loves to pontificate, so you'd have to strike a safe balance between freeing up his time and taking away his joy of preaching.
I can see other cases where something similar could work better, though. A Trump-bot would likely be more coherent than the real thing, would lie - okay, about the same amount. But would definitely be much less malicious, and at least wouldn't reek of filled diapers. And a Johnson-bot would be pretty much indistinguishable from the real thing for speaking, at least? And wouldn't force your liquor cabinet open and guzzle all the good plonk.