At this stage I think the prospect of 076 operating a STOVL aircraft is thinking too far into the future.
The complexity, and performance compromises associated with a STOVL aircraft with anything resembling a modern platform, is significant, and would also be a rather new type of aircraft for the PRC aerospace industry to develop.
Which is to say, such an aircraft would not only have the overall demands of developing a new combat aircraft to contend with, but it would also have the entire STOVL part and navalized factor to add on as well.
We know that a STOVL aircraft of some sort is in development, but we have no strong indication if it is intended to be a technology demonstrator or intended as an aircraft of record (afaik). Frankly, given how poorly optimized the F-35B is, and how much performance compromise a STOVL capability requires, I would be somewhat surprised if the PLA invests into outright developing and procuring a STOVL aircraft, whether it's for 076 or otherwise.
.... all of which is to say, if the 076 is ever to have an onboard manned tactical aircraft element, I see nothing wrong with onboarding J-35s. In fact from memory back when 076 was first rumoured with details about its characteristics, I recall that being able to accommodate manned aircraft like J-35 was an "option" if needed.
However it is also very much the case that using 076 for J-35s primarily is a poor use of the ship/platform, and 076 is likely just as poorly optimized for accommodating a proper complement of J-35s as the America/Wasp class is poorly optimized for accommodating a proper airwing of F-35Bs.
I.e.: the "lightning carrier" concept is not that great. So, using 076s as a "J-35 light carrier" concept is probably going to be poor as well.
STOVL is for landing not takeoff, 076 does not have the angled deck and heavy duty arresting gear for safe manned ops
"Safe manned" CATOBAR operation doesn't technically have any relationship with whether a deck is angled or not, or whether the arresting gear has 3 or 4 wires.
After all, 076 is intended to recover proper sized GJ-21 UCAVs which would have to be recovered in the same way as any manned fixed wing aircraft, and using flight and recovery systems that any modern manned fixed wing aircraft would expect to be upgraded with anyhow.
What 076 is limited in, by being a smaller hull than a proper carrier and lacking an angled deck, is in being able to conduct
high sortie rate CATOBAR operations. If one is operating primarily UCAVs or UAVs, a lower sortie rate like what 076 will be limited to, may not be as big of a deal because UCAVs/UAVs have longer endurance than manned aircraft and a different overall mission profile.
However if one is wanting to operate manned aircraft like a manned tactical fighter, then naturally the inability to manage high sortie rates (because of ship size, deck configuration, limited catapults, etc) will significantly compromise the role of your carrier in being a "light carrier with tactical aircraft as part of its primary role/complement".
..... all of which leads me to my overall point (and one which was made a few pages back by various people) -- it would probably be wise to dispense with the idea of 076 operating manned tactical fighters in any meaningful role.
If one asks or entertains the idea of "
could 076 operate as a light carrier with a large airwing of manned fighters at some point?" (whether CATOBAR or a hypothetical future VSTOL)
IMO the only appropriate answer at this stage is "
no, it cannot. 076's primary fixed wing complement should be viewed as only UCAV/UAV at this stage. The ability to launch and recover manned fighters does not mean it makes sense for a ship to operate an airwing heavily composed of such aircraft".