Dai is the only ethnic group in Xishuangbanna that has its own writing, which is called "Dai language". It is not clear when it came into being and who created it. As for the carrier of Dai language, in addition to folk writing with modern paper, "Mianzhi" and "Baye" are mainly used to copy Buddhist scriptures.

Bayleaf culture is a symbolic title of Dai traditional culture, representing all the history and culture of Dai society, and is a general term for Dai social history and culture. It can more accurately and vividly summarize the characteristics of Xishuangbanna and reflect the unique character and temperament of the Dai people. Bayeux culture includes Bayeux sutra, cotton paper sutra, song book and Dai traditional culture widely existing among the people. It is called Bayeux culture because it is preserved in Bayeux scriptures made by Bayeux.

The cultural classics of Bayeux include two styles: leaves and paper. The leaf shape is Bayleaf Sutra, which is called "Tanlan" in Dai language. It is carved with a folk iron pen on a special "Beilan" (Baye). Its specifications include four lines, five lines, six lines and eight lines, which are called Lanxi, Lanha, He Lan and Lanbie in Dai language. The first three specifications of bay leaf are the most common. Baye recorded a lot of Buddhist stories, Buddhist classics, Dai folk stories, myths and legends. Paper is cotton paper sutra, which is called "Boga Sarah" in Dai language. It is made by dipping a pen made of wild fern stems in ink and writing words on cotton paper. There are two specifications: wide page type and folding type. The post-Dai language is called "thin practice", in which wide page style is the most common. Many long folk narrative poems, folk songs, love poems, proverbs, aphorisms, aphorisms, riddles, laws and regulations, astronomy, calendars, medical and health care, production and life knowledge, moral textbooks, etc. The Dai scriptures are copied with cotton paper books, and a small number of folded scriptures are copied from Buddhist classics.

There is also a touching legend about the Bayeux: Long, long ago, Dai, Hani and Han people went to the West to learn from the scriptures. Han people copy what they have learned on paper, Hani people write what they have learned on cowhide, and Dai people carve scriptures on scallops. On the way back, they were in the same boat when they crossed the river. It's a pity that the boat capsized and these scriptures were soaked. When they spread the scriptures on the beach to dry, the scriptures copied on the paper became bird's toes and became hieroglyphics of the Han nationality; Although the words carved on scallop leaves have been soaked, the handwriting is clear, and Dai Jia is very proud of it. The words written on the cowhide can't be seen clearly after soaking, and the cowhide has been cooked and eaten, so the Hani people have no words.

Bayeux leaf and Bayeux leaf culture have a long history, which can be traced back to the "Baiyue culture" in the pre-Qin period. Bayeux culture not only refers to Buddhist culture and Bayeux sutra, but also includes all the contents of Dai and Thai traditional culture. It is not a prehistoric "living fossil" or an archaeological "cultural relic". Secularity, universality and universality are its most basic characteristics. It is a comprehensive inheritance of family, society and temples in the whole nation, and it is almost a historical form of "national education" ... The coverage is actually larger than that of Xishuangbanna, Dehong and all Dai and Zhuang areas in Yunnan, and it has spread to the whole Southeast Asia and South Asia subcontinent, and almost hundreds of millions of people are inheriting and using this culture.

Because the Dai people in Xishuangbanna share the same ethnic origin (Baiyue nationality) with the Thai people in Thailand, the Lao people in Laos and the Shan people in Myanmar, and share the same belief in Southern Buddhism, and their living areas are connected by mountains and rivers, forming the Baye cultural circle in Southeast Asia, which has the same, similar or similar common characteristics. Therefore, the study of Bayeux culture is an international academic activity.