The National Aviation and Aerospace Agency (NASA) said that it was not invited by China to participate in the research month. The Chinese Ministry of Foreign Affairs said that the United States seems to have forgotten the existence of domestic laws such as WolfWhether scientists and relevant agencies are allowed to participate in dialogue exchange and cooperation by the government. "

According to Politico reports, NASA spokesman Faith MCKIE said on Friday (June 28) that China, France, Italy, Pakistan, and the European Space Administration cooperated to collect from the back of the moon back to the back of the moon.The task of the sample is not invited to participate.She said that although China welcomes scientists around the world to participate in the research month, China has not directly invited NASA.

Chinese Ministry of Foreign Affairs spokesman Mao Ning Monday (July 1) at a routine press conference to answer the reporter that the Chinese government is open to China and the United States for aerospace exchanges and cooperation.The mission issued an opportunity to announce the global, "We also welcome countries around the world to participate in research on lunar samples."

Mao Ning said: "The United States seems to have forgotten the existence of domestic law and other domestic laws. I don't know if scientists and related institutions in the United States will be allowed to participate in dialogue exchange and cooperation by the country."

In 2011, the U.S. Congress passed the Wolf clauses and prohibited NASA from cooperating with Chinese or Chinese enterprises without special approval.