Zhè / piān / wén / zhāng / cóng / lì / shǐ / jiǎo / dù / tàn / yuán / jiě / shì / le / zhè / ge / xí / sú / de / yóu / lái

这篇文章从历史角度探源，解释了这个习俗的由来。

This article traces the source from a historical perspective and explains the origin of this custom.