Pushing a stone mill was hard work, so people often had a donkey pull it.
Tips
mistakes
Here 磨 is read mò, the noun "mill" (also the verb "to mill grain"). The other reading, mó, means to rub or grind down, as in 耐磨 (hard-wearing) and 磨刀 (to sharpen a knife).
culture
The chengyu 卸磨杀驴 "to unhitch the donkey from the mill and slaughter it" describes getting rid of someone once they have served their purpose.
