《南史·本纪·卷六》
一天，有风从西北刮起，黑云随着压来，走到王肃军营的上空，一会儿又风回云转，返回西北，武帝说： 这就是所谓归气，魏军就要败退了。 
一旦，有风从西北起，阵云随之来，当肃营，寻而风回云转，还向西北，帝曰： 此所谓归气，魏师遁矣。 
One day, a wind blew from the north-west, dark clouds gathered, passing over Wang Su's camp, after a while the wind turned and the clouds went back to the north-west, the Martial Emperor said:"This is what is known as 'the return of qi', the Wei army will soon retreat."