I haven't been in the Navy since 79'....and we had to stop doing UNREPs during the day because the Russians kept trying to figure out how we were doing it.
They Chinese always learn how to do things by copying or reverse-engineering everything.
You know, I really don't think that China has the ability to completely resupply a carrier in 8 hours or less (like the U.S. Navy can, and has done for many decades). Yeah, China has 3 carriers, but how long can they really keep one of those diesel powered things out at sea? US carriers can stay out as long as is needed. Around the mid 90's, the US Navy transferred its UNREP fleet to MSC hands, and now civilians do the brunt of the work, but they are still professional, and do things pretty much the way the Navy wrote the book on them. I know, because my first ship was the USS CONCORD (AFS-5) back in the early 80's when it was still a Navy ship. My last sea tour was on the USNS CONCORD (T-AFS-5) in the late 90's after it had shifted to MSC hands. (Yeah, I know, that was one of the cooler things I was able to experience during my career.)