扣槃扪烛

Explanation: Button: knock; palpable: touch. One-sided understanding of metaphor, without the essentials. 　　Usage: Joint type; as predicate; metaphor understanding of one-sided, without the essentials 　　Source: Song Su "day metaphor": "Health and subtle Japanese who did not know, ask the person there for. Or divisions, called: 'Day of the copper shaped like a wooden tray' button while obtaining the sound of wooden tray. Wen Zhong future, that day also. or divisions, called: 'the light of day, such as candles. "palpable candle derives its shape. future hides Yue, that day also." Thesaurus:  Button disc palpable yue