They have “autonomous regions”, but not republics. China is not a federation. Rather, it’s a Unitary state.

But USSR was a Federal state, a union of multiple Soviet republics, and one of the republics (RSFSR) was also a federal republic. Each republic had its own flag, state emblem, anthem and communist party (except RSFSR, which didn’t have its own anthem and party). They did it all according to Lenin’s formula of “The Right of Nations to Self-Determination Up To And Including Secession”. It was the only country in the world to include that in their constitution.

But China doesn’t have all that. Why?

P.S. I’m looking for answers, not confrontation.