From then on, Xiao Lang was a passerby, which meant that from then on, the person he loved in his heart became a stranger. This sentence is a metaphor for the fact that once a woman falls into the home of a high official, her former lover will become an irrelevant passerby. This sentence comes from Cui Jiao's "Giving to the Maid". The full text of the poem: The princes, princes and grandsons are chasing after others, and the green beads are dripping with tears. As soon as Hou Men fell into the deep sea, Xiao Lang was a passerby from then on.