Xu Yuanchong(許淵衝), an outstanding contemporary translator, tried to give an answer to the subject question at http://www.guancha.cn/Xuyuanchong/2016_05_29_362084.shtml.  May I suggest you read it at your leisure.

P.S.  I leave for Dalian this afternoon for a seven-day tour on Liaodong peninsula/Shandong peninsula.  See you later, guys.