《晋书·志·第十五章》
天子亲征的时候就舒展开，是所谓的有武德者的车松开旌旗的意思。
天子亲戎则舒，谓武车绥旌也。
When the emperor went on a personal expedition, he would spread out his banner, which meant that the chariot of the virtuous in martial arts would loosen its banner.