Vladimir Putin, Xi Jinping and Kim Jong-un were caught discussing living to the age of 150 and immortality during China's enormous military parade in Beijing.
An extract of the conversation was overheard on a livestream as the trio were walking in front of other anti-Western leaders to watch the procession.
The Russian, Chinese and North Korean premiers could be heard discussing how advances in biotechnology could see people alive today reach the age of 150.
Mr Putin was caught on tape indicating that repeated organ transplants could result in humans achieving immortality.
The Russian, Chinese and North Korean leaders could be heard discussing how advances in biotech science could see people alive today reach the age of 150
|GETTY
The Chinese dictator can be heard saying to his Russian counterpart: “Earlier, people rarely lived to 70, but these days at 70 years you are still a child.”
Mr Putin replied: “With the development of biotechnology, human organs can be continuously transplanted, and you people can live younger and younger, and even achieve immortality.”
The North Korean was seen in the footage smiling throughout the conversation, but did not speak.
The discussion was overheard during a CCP-run public broadcaster's filming of the military parade.
The Chinese dictator can be heard saying to his Russian counterpart: 'Earlier, people rarely lived to 70, but these days at 70 years you are still a child'
|GETTY
After the broadcaster picked up the snippets of the leaders' conversation, the camera panned to a wide shot of Tiananmen Square, the site of a massacre against student protesters in 1989.
The audio then fades out, and no more words exchanged by the Chinese, Russian and North Korean leaders can be heard.
The trio are then taped climbing aloft a viewing platform to witness the military spectacle in Beijing.
The event was China's largest-ever military procession and celebrated the 80th anniversary of the victory over Japan, which marked an end to the Second World War.
WORLD NEWS - READ THE LATEST:
- At least 15 dead and 18 injured after tourist funicular crashes in Lisbon
- Donald Trump rages as China lays on mass military parade in front of Vladimir Putin and Kim Jong-un
- Tourists warned of VOLCANO alert in Spanish holiday hotspot as locals urged to leave homes
- 'Kinetic strike' takes out 11 narcoterrorists on Donald Trump's orders - as President issues warning
The parade proceeded a summit held in Tianjin in northern China by Mr Xi, who set out blueprints to challenge the US-led Western dominance
|GETTY
The parade proceeded to a summit in Tianjin in northern China by Mr Xi, who set out blueprints to challenge the West.
The annual meeting was attended by over 20 leaders of countries from the "Global South", including Narendra Modi of India, Iranian President Masoud Pezeshkian and Mr Putin.
In a speech, the Chinese leader said: “The shadows of Cold War mentality, bullying, are not dissipating, and there are new challenges that are increasing, not diminishing.
“We must continue to take a clear stand against hegemonism and power politics, and practise true multilateralism.”
In May 2021, a study published in Nature Communications suggested that the limit of the natural human lifespan is around 120 to 150 years according to a computer model.
The oldest person ever officially documented was a French woman named Jeanne Calment, who was born in 1875 and died in 1997 at the age of 122.
A seven-foot-tall Chinese herbalist named Li Ching-Yuen claimed to be 256 years old when he died - alleging he was born in 1677.
In 1928, the North China Daily News and Shanghai Declaration outlets both reported to have seen documents from the imperial government congratulating Ching-Yuen on his 100th, 150th and 200th birthdays.