This word has no specific origin, and was originally created by unknown netizens on the Internet. * * * There are two sentences: Since we don't know each other, the world is a passer-by.

It means that even if we meet again, we will never recognize each other again. From now on, we are strangers living far apart. Among them, "I don't know when I met you" is the same as that in Su Shi's "Jiang Ji Meng"

Even if we meet, we should not know the similarities. From then on, Tianya is a passer-by, similar to Cui Jiao's "From then on, Xiao Lang is a passer-by".