Here is more from the Washington Post:
Then, in 2017, Pauken met a woman who went by the name Cathy and recruited him to become a Chinese intelligence asset, according to court records. Over seven years beginning in 2019, Pauken traveled periodically to the United States to develop sources with access to sensitive information, and was told his reports were so important they were being sent to China’s president, Xi Jinping.
Pauken eventually determined that Cathy, who posed as a think tank consultant, in fact worked for China’s Ministry of State Security (MSS), its lead civilian intelligence agency. She pressed Pauken to develop sources in the U.S. with access to classified information that could be filtered to the Chinese, court records state, though none of his sources produced any.
The article notes that the FBI arrested Pauken at a Crowne Plaza hotel near Washington Dulles International Airport in February.