No matter what ethnicity Duan Wumuchen belongs to, he relied on the Wei Kingdom first, and then the Jin State. On the surface, he pledged allegiance to the court, making him a Jin Minister.
As a Jin Minister, he must bow to Zhao Hanzhang, who represents the court, unless he wishes to wage war, raise his arms and call Zhao Hanzhang a treacherous minister, or directly raise the banner of rebellion and declare he no longer listens to the Jin Court. Otherwise, he must submit to Zhao Hanzhang.
If he had truly made up his mind to fight, he would have crossed the river long before Wang Jun died and Youzhou fell into Zhao Hanzhang's hands. Why wait until now?
