SI and Putin in the Moscow Zoo. June 2019. Against the backdrop of Joseph Biden and Donald Trump, to talk about the age of Vladimir Putin and Xi Jinping is somehow inappropriate. Compared to the former and current American presidents who can meet in the new cycle of the election campaign, the Russian president and Chinese chairman look, of course, not boys, but by middle -aged politicians - and why be shy of Russian or Chinese gerontocracy against the background of American?