Stupid, yes. Demented, yes. He does realize what he's being told to parrot, he got paid for it very well.
Hunter Biden, Rosemont Seneca Partners LLC, negotiated a $1.5 billion investment deal with the state-owned Bank of China at the same time that his father, then the vice president, was conducting high-level diplomacy with Beijing. (On one of his trips, Hunter allegedly made use of Air Force Two.) Whether or not the Chinese hoped to curry favor with Hunter’s father, Trump allies are sure to make note of the issue, especially given Joe Biden’s controversial remark this week downplaying China as an economic competitor.
https://www.vanityfair.com/news/2019/05/biden-ukrainian-gas-company