Hot mic catches Putin and Xi discussing organ transplants and immortality

Live footage of private conversation between Russian president and Chinese leader aired at Beijing military parade

The authoritarian strongmen Vladimir Putin and Xi Jinping have mused on how organ transplants might lead to immortality, during a brief exchange of small talk caught on a hot mic at a military parade.

The Russian president was in Beijing on Wednesday with the Chinese leader, who hosted allies for a ceremony to mark the 80th anniversary of the end of the second world war.