[lǚ chuān zhǒng jué]   

履    穿    踵    决    鞋子破了，露出脚后跟。形容很贫苦。

One's boots leaked dreadfully and in both of them there were big holes at the heels

履足差肩    履薄临深    履机乘变    履霜坚冰    履汤蹈火