尽心竭力

Explanation: Exhaustion of mind, all out. Work very hard to describe. 　　Usage: Joint type; as predicate, object, adverbial; describe things very seriously 　　Source: "Song Shuzong more mass": "slay the public and Ho Chi-mai, group, everyone dedication, it is God by virtue of their minions, nothing to fear." 　　Examples: Qing When ~, service will be back in the Zhou Bing, to capture the first offense. (Ming Xu Zhonglin "Gods," the eighty-fifth back) Thesaurus:  all-out efforts, daily Have no time to sundial, be fully occupied everyday, day and night laboring, Yikuishiqi, Day wan, fully stretched made to work, etc at the limits of one's capacities or talents, exert, endeavour