Another example is "" (', lit. "melon field, beneath the plums"). It is an idiom whose meaning relates to the appearance of misconduct or impropriety. It is derived from an excerpt of a Han era poem (, "Yuèfǔ Shī" ""Jūnzǐ Xíng""). The poem includes the lines, "Don't adjust your shoes in a melon field and don't tidy your hat under the plum trees" (, '), admonishing the reader to avoid situations where, however innocent, he might be suspected of doing wrong. The literal meaning of the idiom is impossible to understand without the background knowledge of the origin of the phrase.