Elaine Chao's meeting with Chinese Vice President Han Zheng in Beijing on June 17—three days after Sen. Mitch McConnell's hospitalization—was not tied to official U.S. government business. According to a news release by the Chinese Embassy, the two discussed "a new vision of a constructive China-U.S. relationship of strategic stability".
While the official purpose was to discuss bilateral relations, the unusual timing of the trip sparked public scrutiny and media questions regarding the nature of the visit, given Chao's lack of an official U.S. government role.
You can read the Chinese government's statement regarding their diplomatic meeting on the Embassy of the People's Republic of China website or view local news coverage on WLKY.
“Elaine Chao’s meeting with Chinese Vice President Han Zheng ...was not tied to official U.S. government business.”
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Because it was official PRC business