孳孳汲汲

Explanation: Feeling anxious, diligent hard look. 　　Source: Ming Liu Ji, "free classified Jinhua Xu Kun Huang Shu Province, order" so Zizi engrossed, not to mention themselves, Yang and Xing Mu Chi light, overlooking the water under the bridge and long arms ... ... to be holy and Xi Wei. " 　　Examples: Japanese repeat itself afraid to bother, ~ to make this many from the Han to Tang fake antiques. ★ Lu Xun, "said the grave beard"