夕惕朝乾

Explanation: Refers to the ground carefully day, nose to the grindstone. 　　Source: "Easy to do" gentleman Dry all day, if Ti Xi Li, Without Harm. " 　　Examples: Day Shen month ordered, Tezu cases the rules have been tested; ~, are courtiers authentic distinction. ★ Ming Jang "test hands full Hsieh Shu Gann"