《晋书·帝纪·第一章》
回答说： 去一百天，回一百天，攻打一百天，用六十天作为休整，一年足够了。 
对曰： 往百日，还百日，攻百日，以六十日为休息，一年足矣。 
The answer was: One hundred days to go, one hundred days to return, one hundred days to attack, and sixty days to rest, which is enough for one year.