手足重茧

Explanation: Feet covered with layers of calloused hands. Describe the long-term fatigue. 　　Source: "Huainanzi repair service and training" For Gongsong Xizhe Chu, Wen and Mourning of Mo, since the trend and to Lu, 10 ten nights, and not enough heavy cocoon where. " 　　Examples: ~, Bear their suffering. (Qing Pu "Strange labor Sandoz")