This is the best summary I could come up with:

BANGKOK (AP) — China’s space officials said Thursday they welcomed scientists from around the world to apply to study the lunar rock samples that the Chang’e 6 probe brought back to Earth in a historic mission, but noted there were limits to that cooperation, specifically with the United States.

“The source of the obstacle in US-China aerospace cooperation is still in the Wolf Amendment,” said Bian Zhigang, vice chair of the China National Space Administration.

The Wolf Amendment was enacted in 2011 and prevents direct U.S.-Chinese bilateral cooperation except in cases where the FBI can certify that there is no national security risk to sharing information with the Chinese side in the course of work.

It worked with the European Space Agency, France, Italy and Pakistan in the Chang’e 6 mission.

“I’m afraid this matter will not be revealed until tomorrow, so I hope everyone can wait patiently for another day,” Chang’e 6 chief designer Hu Hao said at the news conference.

The probe had landed in the moon’s South Pole-Aitken Basin, an impact crater created more than 4 billion years ago.

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