Who said seven children go and six children go back?

"Seven sons go to six sons to return" is often associated with the legend of Yang Jiajiang. It is generally understood that the seven sons of the Yang family are fighting abroad, and only one of the old six is back. Six other people are said to have died on the battlefield. In order to avoid the pursuers, Goro went to Wutai Mountain to become a monk, and Shiro was captured by the Liao army. Only Liulang air billow rushed out of the tight encirclement. It can be said that the Yangmen clan suffered heavy losses in order to protect the Song family.