The Tay people are the ethnic minorities with the largest population in Viet Nam, mainly distributed in the Northern Uplands and Midlands, mostly concentrated in the provinces of Cao Bang, Lang Son, Tuyen Quang and Ha Giang. Over the long history of development, along with the development and improvement of their language, the Tay people have gradually created a type of writing system using the graphic, phonetic, and meaning elements of Chinese characters in combination with indigenous phonetic and linguistic elements, to create the system that is called the Nom-Tay scripts or the Nom script of the Tay ethnic group. Traditional Tay literature is mainly recorded in this Nom - Tay script. The article reliesupon the texts that belong to the genre of narrative poetry (in this genre, a story is written as a long poem) written in Nom - Tay- the most significant part of the written classical folk literature of the Tay ethnic group. Materials from the texts, currently stored at the Institute of Sino - Nom Studies (Vietnam Academy of Social Sciences), will be used to conduct an analysis of the usage and the method of writing of the Chinese characters in these texts. Thereby, the article strives to confirm the important role and the ample appearance of the Chinese characters in VietnameseNom- Tay texts.

The development of Nom characters is promoted on the basis of and in attachment with Chinese characters, and in this regard the Phonetic Annotation of the Thousand Character Classic 《千字文解音》 compiled in the late Nguyen Dynasty in Vietnam was a very practical textbook for learning Chinese characters and Nom characters. Based on categorizing Nom characters, the paper intends to clarify several notions on Nom characters of the Phonetic Annotation of the Thousand Character Classic. In the beginning, Nom characters can be divided into two major types: the directly borrowed Chinese characters and the independently invented ones. The former includes borrowing sounds, meanings, and both. The latter, according to the components of Chinese character formations, can be divided into the pictophonetic of Chinese characters and that of Nom characters. In the last part of the article, we summarize the relationship between Chinese characters and Nom characters. It is necessary not merely to consider the relationship but to understand the comparisons between them. With the aid of studying Nom characters, we can find that irrespective of whether they are directly-borrowed from Chinese or independently invented, the sound of Chinese characters is the most important feature for them. But we cannot ignore the ideographic parts of Nom characters because they, on the one hand, make up the phonetic deficiency of Chinese characters while promoting the development of Nom characters on the other. In our modern society, Chinese characters and Nom characters came to drift apart, and the latter especially was withdrawn from the historical stage, but the traditional culture of Vietnam is still recorded in literature both in Chinese characters and Nom characters. Moreover, the Nom character is one of the most important representatives of Vietnam’s traditional culture. For this reason solely, this research shall be a great help to further understanding of significant cross-cultural aspects between China and Vietnam, and more specifically of histories related to the spreading, application, and development of Chinese characters in Vietnam.

Based on the reference achievement scholars before, combined with the actual survey results on Nom Tay documents currently stored in Institute of Sino-Nom Studies, conducted article comparing other cases face each other and are similar in structure between the written word: Nom of the Kinh and Tay ethnic group in Vietnam with the letter of the Zhuang ethnic blocks (Guangxi, China). This indicates that, basically 3 types of this writing there are a lot of similarities in terms of composition, the differences are very small and specific characteristics. This sector should be studied in depth and hopefully more will have interesting results in the future.

In the first century, Sinographs and Chinese culture were transmitted to Japan, Korea and Vietnam, simultaneously had profound impact on countries they passed by, and then, formed the vast Sinographic Cosmopolis. During the contact with Sinographs and culture, the people of all three nations had created their writing systems that based on these elements of Sinographs. Based on script evidences recorded in Kokuji no Jiten, this article will analyze the characteristics and suggest the historical divergence of the Waji system (also called the Kokuji), conduct comparisons with the Vietnamese Nom script, develop the model of the structure of these scripts, and specifically point out the similarities and differences of these two writing systems.