1)China has demonstrated it can do faceting on jet fighters to evade radar. I don't see why they can't do the same on ship.
2)More stealthy than conventional aegis destroyers like what Japan has currently.
3)I don't see the need for Rail Gun. All it needs to do is get close enough to enemy ships and then release massive amount of anti-ship missiles.
4)Should carry air defense missiles and phase array radar.
5)It's small RCS should be difficult for enemy anti-ship missile to target
1) It's not as simple as that, but I agree, that the chinese military ship designers should be able to design a comprehensively stealthy ship like zumwalt
3) There's no need for two massive 155mms like zumwalt either. Personally I think the zumwalt class will have made a lot more sense with the second AGS removed for more VLS cells. Although there should be an IPS like zumwalt to facilitate laser and rail gun weapons when they eventually come about.
4) Yes, no self respecting multi role destroyer these days will lack a phased array radar or SAMs
5) a smaller RCS will bring other benefits as well
Major surface combatants will naturally become more stealthy, so there is no need to call for a super stealthy destroyer like zumwalt. What the PLAN needs, are a class of larger cruiser sized ships carrying significant numbers of VLS cells, powerful phased array radars, integrated propulsion systems, new and larger C4I facilities, multirole attack capabilities, all within a single, survivalbe hull with growth for new technologies and weapons for the forseeable future.
That will naturally give you a large 10k ton+, stealthy surface combatant possibly resembling zumwalt in some degrees. But you don't need two whopping 155mms or a tumblehome hull. Function dictates form, not vice versa.