China’s space officials said Thursday they welcomed scientists from across the world to apply to study the lunar rock samples the Chang’e 6 probe brought back to Earth in a historic mission, but noted there were limits to that cooperation, specifically with the U.S.
The obstacle is the US government forbidding any cooperation between NASA and China's space program. Thankfully acedemics in the US and China find ways to circumvent these rules in some cases.
But yeah, jealously guard your old moon rocks, I doubt you'll be getting any more.
Just you wait until they figure out how to stop their rockets from exploding on launch or leaking helium everywhere! You won’t be laughing then!