Re: Say it ain't so!
No, China does things differently.
In the US, it's all about heroes. The individual is sovereign, one person - almost invariably a Man - gets the credit for everything, even though we may all know they have a team of minions doing the actual work.
In China, everything is collective. Li isn't premier because he's a hero, but because he embodies the collective philosophy, authority and will of the Communist Party. So he doesn't need to tweet personally - his views are reliably reflected by the Communist Youth League (and similar groups) on Weibo.