匦函投书是一种区别于一般行文程序的文书投递方式。所谓匦函,就是箱匣,类似今天的意见箱,不过它只是设在官府之内。这种投书方式曾实行于唐宋时期。 公元684年,“素多智计,兼涉文史”的武则天在唐高宗(李治)死后独揽朝政。她一方面任用酷吏,兴狱杀戳;一方面选拔贤才,纳谏知人。为了巩固其统治和广开言路,除在朝门外设置登闻鼓与肺石,及时听取臣民申诉外,还于公元686年(则天后垂拱二年)采纳了朝臣鱼保宗的奏请,在朝堂内设置匦函四个,并按照所在的不同方位,以春、夏、秋、冬四时,饰以黑、红、白、青四种不同的颜色,收纳各种不同的上书:在东面的,主春,黑色,凡有关教黎民、劝农桑者投入,名为延恩匦,也叫青匦;在南面的,主夏,红色,凡有关论 Letter to vote is a letter from the general procedures for the delivery of instruments. The so-called letter, is the box, similar to today’s suggestion box, but it is only located within the government. This type of investment has been implemented in the Tang and Song dynasties. In 684 AD, Empress Wu Zetian, who was known as Su Zhoushi and involved in literary history, monopolized the government after the death of Emperor Gaozong (Li Zhi). On the one hand, she appoints cruelty officials and kills slaves; on the other hand, she selects virtuous men and advisors. In order to consolidate its rule and open his mouth, in addition to the North Gate to set up books and drums and lungs, and promptly heard the appeals of civilians, but also in 686 AD (then the arch two days later days) adopted a petition courtier fish Paul, There are four letter sets in the hall, and according to the different directions, spring, summer, autumn and winter four, decorated with black, red, white, green four different colors, incorporating a variety of letters: in the East Face, the main spring, black, where teach Lebanon, advised farmers to invest in sang, called Yan Yan, also known as barley; in the south, the main summer, red, where the theory