LOL NO! it wouldn't be.minimal changes! You cant just bore a hold, stick a canopy on top and turn it into a manned fighter. It doesn't work like that.
I was basing my speculation on the fact that f.e. there are UCAV versions mulled for T-75 and various NGAD/FA-XX projects and probably others as well (B-21 unmanned variant contemplated iirc?). A T-75 UCAV would be more or less in the same weight/power class as the chinese UADFs. So while the above projects seems to stem from manned aircraft, it is not unreasonable to assume that the possibility of manned versions of the CAC/SAC would not have been considered, as i said imo the driver for that would be primarily exports or perhaps VTOL (for which there are signs suggesting VTOL fighters are seriously contemplate).
Previously it was argued that for such a manned single engine 6th gen a clean sheet project would be needed, but given the multitude of very advanced airframes being worked on in China right now, at least two 6th gen and 2 or 3 UADFs, yet another clean sheet design might probably not the most indicated use of design resources, perhaps it's better to make maximum use of existing airframe elements (not unlike T-75 came to be).
To be clear, i don't know if manned versions of the UADF were contemplated and/or whether a single engine export 6th gen fighter is being considered (not unlike the JF-17 project in scope f.e.), but this is a possibility we shouldn't discount and should keep an eye out for.