Sources and links are mostly referring to Chinese based ones but in English there are a few mentions. One from SCMP.
Don't confuse this with the re-entry MaRV guidance for ASBMs which has to do with creating a communications method by somehow getting through the plasma cloud from re-entry. That was done via satellite links from the rear of the vehicle and not just any direction in the rear, apparently that required a lot of careful engineering to complete. The vehicle itself is specifically designed so that rearward comms with satellites can be established where comms components are obviously engineered with all this in mind and from the ground up. Idea speculated would be WZ-8 or another of the many HALE or even MALE drones providing targeting information, feeding that to satellites, and then feeding that to MaRVs.
The heat seeking hypersonic missile is a totally different thing.
It was speculated to be related to a payload delivered by the global ranged hypersonic vehicle. The events may or may not be related.
China conducted a global ranged hypersonic flight which US defence personnel described as "broke the laws of physics" and during this flight it dropped a payload. It wasn't clear if that was supposed to simulate a nuclear warhead or the vehicle's self defence system with a small interceptor. Then there was some info from Chinese leaks about heat seeking hypersonic missiles (whether that would be air to air or air to surface we don't have a clue). Is the payload the same thing or are they two separate platforms, no clue. I think people have begun conflating a lot of it.
