Explanation: Green flies: flies, metaphor into the calumny of the people; factors: raw white silk. Flies stained Su practice. Refers to the use of slanderous Wuhai good villain. Usage: The main predicate; as object; containing derogatory Source: HW as a "tired Lunheng harm": "clear by the dust and white check scale; green flies are dirty, often in the practice element." Examples: And ~, the same is hereby in the fan. ("Biography of the Later Han Memorial")