PLAN does name ships after persons, but only training vessels...in China, the whole problem of naming anything after a person has a lot to do with political sensitivity, or political correctness in general terms. While that's a touchy issues everywhere - which is why many countries simply opted not to name ship after persons - in China it can go to nit-picking proportion.
Logically, principle surface combatant such as aircraft carrier, if to name after anyone, would only be fitting to name after leaders and generals, but who in modern Chinese history would be "clean enough" to be "indisputable", or at least not to send a wrong political message? The list is either very short or none. There's a good reason why Zhou Enlai and Deng Xiaoping chosen cremation and scatter their ashes in the winds rather than proper burial: in China, you might be praised in this decade, and then denounced in the next when the wind change direction.
So it's far less complicated to name after places instead.