Refers to the situation of looking at a thing or a thing from the perspective of an ordinary, irrelevant and uninterested person.

The emergence of this word originated from some events on social networks, such as someone published an article or a Weibo on the Internet, but this article or this Weibo caused some controversy or criticism. The author himself was accused of being a "passer-by", that is, he had no real position or viewpoint, but was just publishing some seemingly neutral opinions.