Maybe I'm just getting my hopes up a little too much, but considering the CZ-9 is still in the earlier stages of development compared to the CZ-7 and CZ-5 rockets, whose designs are essentially locked in by now, the engineers could be leaving room for a potential reuse solution in the future. Although so far there has been no official dialogue regarding reusable rocket development in China, it would not be unreasonable to speculate that there are people who are seriously discussing this idea behind closed doors.
When it comes to Orbital Space flight, Reusable is hard and to date every reusable has been partially reusable. The Russians and Europeans once ran a think tank on Reusable, On paper It seems like a great Idea, However it's not Always perfect and their are a lot of issues to work out. The Think tank concluded it was more economical to just build disposables. The Problems being the cost of holding that extra fuel for the return trip, the inspection and re-certification of the rocket followed by repair and reconditioning.
Case in point is the shuttle Program. The Shuttle reused three main components, The Orbiter with it's 3 SME's and RCS system and heat resistant tiles, and the two SBR's.
the large Center ET or External Tank was dropped on orbit for a burn up it had no previsions for serious reuse. There were concepts of reuse, some wanted to use them to build a space station but the thin skinned aluminum hulled ET's were never intend to reenter the atmosphere and survive.
The Falcon 9 which is the closest to ready to reusable in the orbital range can only recover the first stage and the Dragon Capsule, the upper stage and dragon UN-pressurized module is lost. and to date it's only had two successful recoveries.
The Falcon heavy would be again fist stage recovery for three first stages. The second stage lost.
Currently NASA and Russia doesn't really care about reusable. I mean one of the subprograms of SLS is the RS25-F which aims to convert the RS25's from a reusable into into a disposable rocket engine.
ULA, wants to just have the engine cores drop from the first stage as those are the most expensive parts.Airbus want to build Adeline a concept where the first stage engines separate from the booster first stage, deploy wings and propellers and fly to a runway to land. There have been in the past similar concepts for externally mounted boosters along the same Idea as Adeline Where the booster would become a reverse shuttle deploying wings and gliding to a recovery zone Germany's Liquid Fly-back Booster, The Russian Baikal and the USAF Reusable booster system but every one was canceled.
The Indians seem interested, their AVATAR concept is a single stage to orbit which is the most reusable concept their is as by only having the main craft and not breaking of parts the whole thing comes back. but that will take more work. until then they are working on the RLV demonstrator which uses a expended booster first stage. Skylon is another SSTO concept currently under development The Japanese have the Kankoh-maru proposal. Now what comes of these is hard to say. SSTO's have a bad track record of actually getting built they are daunting Challenges. The only other Idea would be to rather then build a Rocket first stage use a Plane.
Vulcan Aerospace Stratolaunch would have a totally reusable first stage being a airplane built from 2 747-400s The down side is you still need a Rocket second stage and that even with the dual 747's its not as efficient for a really really big payload. I mean Stratolaunch has a concept for a manned payload based on the SNC Dream chaser but at sub-scale a 2-3 man crew vs the full Dream chaser with a 7 man crew.
Being frank Reusable would probably be easier on Mars or the moon then earth both having smaller gravity wells and less destructive atmospheres
