The amazing feats of centenarian athlete Fauja Singh are certain to impress Hong Kongers today.
But it seems the man they call the 'Turbaned Torpedo' hasn't made the same impression with the Guinness World Records organisation.
It has refused to accept him as the world's oldest marathon runner because he can't provide them with a birth certificate.
Teetotal vegetarian Singh ostensibly became the oldest runner to complete a marathon last October when he finished the Toronto Waterfront event.
And when he appears in the 10 kilometre race at today's Standard Chartered Hong Kong Marathon, he's sure to be a star attraction.
However, sticklers for procedure at Guinness World Records, the global authority in record-breaking, have refused to recognise his achievement as there is no official document to verify his age.
'We have not currently received the necessary proof of Mr Singh's actual date of birth in order for us to ratify his claim,' a Guinness World Records spokesman said. 'The claim will remain open until such evidence is provided.'