Li Ching Yun had an advice for living a long life: "Keep a quiet heart, sit like a tortoise, walk sprightly like a pigeon and sleep like a dog" - and apparently, he followed his own advice, because Li died at a ripe old age of 256!
Environmental Graffiti has the story:
By his own admission he was born in 1736 and had lived 197 years. However, in 1930 a professor and dean at Minkuo University by the name of Wu Chung-chien, found records “proving” that Li was born in 1677. Records allegedly showed that the Imperial Chinese Government congratulated him on his 150th and 200th Birthdays.
However, it is somewhat neat.
There are hundreds of accounts of pre "modern world" Chinese monks and ascetics with remarkable physical accomplishments. Are they all true? No. Are some of them true? Absolutely.