韩国从古代开始受到中国的礼制影响很大，所以逐渐成为了一个对礼仪要求非常严格的国家。这些礼仪不仅体现在韩国人生活的方方面面，而且在语言、文学作品、书信等中都能够体现出来。论文中对韩国书信中的礼仪文化进行了研究，通过了分析后可以发现，一直到现代社会礼仪文化中，长幼尊卑的情况在韩国到处可见，这种文化是维持社会正常秩序的伦理，也是韩国儒家思想文化中重要的一个组成部分。但就像文章中提到的一样，长幼尊卑的伦理秩序是很重要的，但是不能以单纯的方式判断人与人之间的阶级。所以需要深入了解这些礼仪文化才能够掌握。

Since ancient times, Korea has been greatly influenced by Chinese etiquette system, so it has gradually become a country with strict requirements on etiquette. These etiquette is not only reflected in all aspects of Korean life, but also in language, literary works, letters and so on. In this paper, the etiquette culture in Korean letters is studied. Through the analysis, we can find that, up to the etiquette culture of modern society, the situation of the superiority and inferiority of the elders and children is everywhere in Korea. This culture is the ethics of maintaining normal social order, and it is also an important part of Confucianism culture in Korea. But as mentioned in the article, the ethical order of elders and children is very important, but we can not judge the class between people in a simple way.