Literature Reference: 紫笔亲教书姓名，玉皇诏刻青金简。—— 《赠毛仙翁》 The purple brush personally inscribes the name, as the Jade Emperor's decree is engraved on the green gold scroll. Source from 'To Immortal Mao'.
紫: Represents a person of authority and prestige.
笔: The brush pen, a tool for writing and painting, later came to symbolize the instruments for calligraphy and drawing, embodying the art of writing and the techniques of brushwork.
Meaning: The purple brush symbolizes nobility and sanctity, often used for writing important documents or decrees.