China’s spy joke with South Korea that sounded like a warning

Chinese President Xi Jinping gifted South Korean President Lee Jae Myung a pair of smartphones, jokingly telling him to 'check if there's a backdoor' — referring to the risk of unauthorized bypassing of security controls. Andrew Chang breaks down the layers of Xi's comment to better understand what may have been hidden behind the humour.

Images provided by The Canadian Press, Reuters and Getty Images