我国古代文书,一直是由上到下竖行书写的,回行时由左侧依次排列下去。文字由上而下书写,一行中自然就有上下之分,行文中遇有需要表示特别尊敬的字样,虽然一行还没有写满,也要回行顶格书写,甚至高出一格以至几格。如果不便回行,便要在行中空出一格或几格。这样,那些需要表示尊敬的字样在字面上就高高在上,显得非常突出。这种书写形式称为抬写,通称抬头。封建社会是等级制社会,人们的身份被分成高低不同的等级,所谓“天有十日,人有十等”,“王臣公,公臣大夫,大夫臣士,士臣皂,皂臣舆,舆臣隶,隶臣僚,僚臣仆,仆臣台,马有圉,牛有牧,以待百事。”每个人都在特定的等级中生活,居处言动、待人接物都有符合各自身份的规范,这是封建礼仪的精髓。文书抬头制度是这种礼仪在文件上的反映。不过这种制度反映到文件上的时间并不太早,现在所见最早的是秦二世东巡时在泰山、琅邪台等处秦始皇所刻纪功石上补刻的文字。据《山左金石志·琅邪台石刻》所录,二世补刻的文字共存十三行,足行八字,遇“始皇帝”和称颂秦始皇“成功”字样,都回行顶格写刻,最后“制曰可”也回行顶格。秦始皇统 Ancient Chinese instruments, has been written vertically from top to bottom, when the line back from the left side of the order. The text is written from the top to the bottom. There is a natural upper-lower point in his party. In the written language, there is a need to show special respect. Even though his party is not yet full, he must write back the top of the line and even be higher than the other. If you do not go back, you have to empty one or a few squares in the line. In this way, those who need to show respect for the word literally stands tall and stands out conspicuously. This form of writing is called lifting, commonly known as head-up. Feudal society is a hierarchical society, people’s identity is divided into different levels of high and low, the so-called “days have ten days, people have ten,” “Wang Chen Gong, Gong Chen doctor, doctor, scholar, soap Chen Yu, People, bureaucrats and bureaucrats, bureaucrats and bureaucrats, servants and courtesans, horses and horses, cattle and herdsmen, waiting for Pepsi. ”Everyone lives in a particular hierarchy, This is the essence of feudal etiquette. The rise of the clerical system is a reflection of this ritual in the document. However, it is not too early to reflect such a document on the document. The earliest evidence we see now is the inscription engraved on the sculptures of the Qin Shi Huang inscribed on Taishan, Langya, etc. at the time of the Eastern Zhou Dynasty patrol. According to the “left left Jinshi Chi Langya Stones” recorded, the second memorandum of writing coexistence of thirteen lines, foot character, case of “emperor” and praised the emperor “success” are written back to the top grid, and finally “System can be said” can also return to the top grid. Qin Shi Huang system