极重难返

Explanation: Still deeply embedded. Refers to the long-established customs, habits, flaws or a situation difficult to change. For the negative aspects. 　　Source: Qing Gu, "A Su Rizhilu the weight of two government land tax," the solid back of their difficult situation extremely seriously, started King _set_, finished in the Hongwu, the amount of the levy Department, who is also ten times Shaoxi ago. " 　　Examples: 'Manchurian' Incident ... ... Since the formation of the current 'end their national crisis' of the unity and resistance, which is really the nation's largest wedding. However, there are many things the body ~. ★ Guo "feather the necessary _set_ of the armed people"