As the tide turned against Yuan Shao, two of his generals, Zhang He and Gao Lan (高覽), destroyed their own camps and led their men to defect and surrender to Cao Cao's side.
Ketika arus berbalik melawan Yuan Shao, dua jenderalnya, Zhang He dan Gao Lan (高覽), menghancurkan kamp mereka sendiri dan memimpin orang-orang mereka untuk membelot dan menyerah ke sisi Cao Cao.