Don't smoke, eat less and exercise more are common tips for a long life, but when the advice comes from a 108-year-old priest, it should be taken as gospel.
Father Nicolaus Kao Se Tseien is listed in the Guinness World Records as the oldest Catholic priest. He was born two months before Soong May-ling, the wife of Nationalist leader Chiang Kai-shek, and she died in 2003, aged 106.
Attempts to confirm he is the oldest person in Hong Kong have so far failed because the only government statistics available are from 2001, which show there were 697 people over 100.
Father Kao is about to be recognised as holding another world record - the oldest person to have a cataract operation. In a wheelchair at St Paul's Hospital for a check-up after the operation in May, the sprightly Father Kao is gleeful about his regained sight. 'My legs have not got enough strength to walk, but I can see clearly now. You are beautiful,' he smiles. 'I can read the Bible and all the good books now. It is great.'
Despite requiring a wheelchair at times, he loves to chat and always asks people to guess his age. Many usually say he is in his 80s, and he proudly tells them he is 108 years and five months old.
'I was born January 15, 1897. I am five years older than the [South China Morning] Post,' he says.