President Trump’s phone conversation with President Volodymyr Zelensky of Ukraine is deeply problematic. But Joe Biden’s decision to allow his son, Hunter, to travel with him on a 2013 trip to China is a problem for the former vice president.

As NBC News reports, Hunter joined his father’s official visit while seeking Chinese investment for a new equity fund he was forming. While NBC says there are no indications Hunter met with Chinese government officials during the visit, it notes that Hunter attended some formal events with his father. NBC also confirms that Hunter’s equity fund received its Chinese license just 10 days after the trip. These things should concern us.