I think that is a sore spot for a lot of armed forces these days. A dedicated close support aircraft means the force can obtain air superioity and enough resource to keep an dedicated close support arm. Must country are using multirole fighter/Helo gunship to fill in for this role.
Chinese is developing a attack helo, which is good news. I doubt PLAAF still have enough resource to design/import a fixed winged solution. At the moment, The possible conflict is with taiwan or Japan. there are no platform to lunch helo in to middle of the strait, and Q5 is good enough to carry out groud attack with out fighter escort. It is not too bad in a dog fight.( I think it even managed to beat Pakistan's F16 once). Conflict with Japan.. that's navy's job. So a dedicated close support is not urgently needed but good to have one day. A lot of the M-17 Helo have weapon plyon's to handle machine gun pods and rockets, they can do some of the close support tasks too.
Notice that I didn't put U.S. in the picture. I thoughs are: U.S. should hold the upper hand in air after certain amount of loss. One they have the upper hand. PLAAF's close support will be a one way trip... long range artillery probably will be the better pick.
By the end of it, it is all about limited resource. Chinese force wil use the fund to improve their fighter arm and improve their multirole capability, but I won't see they developing a dedicate fixed wing close support aircraft. The WZ-10 project will be more towards tank hunt. There are 2 mil PLA standing army,all they need is rifle and grenades. U.S. will run out of money before they can kill every one of them. Who needs close air support.(only joking)
