百折不屈

Explanation: By numerous _set_backs do not yield to waver. Described as strong-willed. 　　Source: Qing Yun Jing "<Zhuozhong Yi Public manuscripts> book": "Once a way its name, history and government of the County records, there shall not be thousands of years later, everyone moved discoloration, a hundred fold unyielding person, as in the heart, such as out of its mouth, such as Faithful Lion, Fangxue Shi, who is also Book of iron. " 　　Examples: Prime Minister should be like that ... ... selfless, ~. ★ Guo Xiaochuan "mourning beloved Premier Zhou Enlai," Poetry