Hi I'm going to Guangzhou with my guitar

Hi I'm going to Guangzhou from Melbourne with my 40-inch-or-so guitar (it has a wooden case). Is it allowed if I want it hand-carried? I don't want it be put into the checked in area which it would probably be damaged……
And I want to ask the same question about domestic flights in China cuz I would travel to some other cities in China.
Thx in advance!