Emperor Liu Che (156-87B.C.) ascended to the throne at the age of 17 and died at 71.He was fond of travell and inspection. During his reign, he went to inspect for 23 times. As you know, travell can be a physical exercise and it improves the health condition. This might be one of the reasons for his longevity.
He was also a diligent and strong-minded person. This is also necessarily important for a person to live longer.