矢志不移

Explanation: Determined vowed never to change. 　　Usage: Verb-object type; as predicate, adverbial; with compliment 　　Source: Qing Pu, "Chou Liao aunt": "Zhong Shu Lian Li Shang their marriage, recalcitrant drive, Shaw determined to not shake." 　　Examples: Feng Xuefeng "On": "He is such a spiritual quality to ~ serve the people." Thesaurus:  back and side, swear to be loyal forever, Vector Zhong consistent, Unshaken, Dare to die Not II