The Chairman of the Central Military Commission is the head of the Central Military Commission (CMC) and the commander-in-chief of the People's Liberation Army (PLA), the People's Armed Police (PAP) and the Militia. The officeholder is additionally vested with the command authority over China's nuclear arsenal.
Access to the nuclear arsenal seems like excessive power for a figurehead. Xi Jinping holds that office.
The other countries have a term limit for who wields that power.