It is hard not to be impressed by the sheer energy Donald Trump displayed during his whirlwind visit to Beijing. Within just 43 hours, the 79-year-old president held two meetings with Chinese President Xi Jinping, inspected troops, attended a state banquet and walked around the Temple of Heaven in sweltering heat – not to mention making his characteristic social media postings in the wee hours of the morning. Showing no signs of jet lag, Trump seemed to be in high spirits, glad-handing everyone.