BEIJING: Chinese leader Xi Jinping and Russia President Vladimir Putin chatted about how advances in science could prolong the human life span in a rare hot mic moment in the Chinese capital.

The brief exchange was captured on a live news video feed of Xi and Putin as they walked on a red carpet with North Korean leader Kim Jong Un at the head of a large cluster of high-level guests. The group was going toward the viewing platform for a major Chinese military parade on Wednesday.

Xi spoke first, and although only parts of his words can be made out, a translator followed in Russian: “Before it’s said to be very rare to live up to 70, and now it’s said that you are still a child at 70.”

Putin, turning toward Xi, gesticulated with pointed fingers as he responded. Kim, on the other side of Xi, turned in to listen to both, breaking into an occasional smile.

The Russian president’s words are inaudible, but after he spoke, an interpreter can be heard translating what he said into Chinese.