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: Papermaking is one of the four great inventions in ancient China and an outstanding achievement in the history of human civilization. Now it has been included in the intangible cultural protection list of Chongqing. Peng Shui's bamboo board bridge papermaking has been passed down from generation to generation. It is the reappearance of Cai Lun's ancient papermaking, but this legacy will soon be lost. This paper explores the cultural value and practical significance of this technology through on-the-spot investigation and collection of relevant materials, analyzes the reasons for its loss, and puts forward measures for its protection and development.

Keywords: Peng Shui; Cai Lun papermaking; Protection

Pengshui is a small county located in the southeast of Chongqing, and a village called Zhubanqiao in the deep mountain of Pengshui still retains one of the most primitive folk crafts-Cai Lun papermaking.

Because modern culture is constantly pounding ancient culture, many cultural heritages are in danger of extinction, and Peng Shui's Cai Lun papermaking is no exception. Therefore, we should step up the pace of its protection and find a method with both protection and development on the basis of combining local national culture.

First, the historical origin of papermaking in Cai Lun

In the Eastern Han Dynasty, agriculture was developed and the national strength was strong. Cai Lun invented the fiber paper made of plants in the first year of the Eastern Han Dynasty. At first, the paper made in Cai Lun was mostly made of bark, rags, old fishing nets and hemp heads, which was both light and beautiful. In 15, Cai Lun reported this great invention to the imperial court, was awarded, and ordered the whole country to adopt [1]P43. Since then, paper has entered the social and cultural life with a new posture, and gradually spread in China. In 317 AD, Si Marui, Emperor Wen of the Jin Dynasty, moved the capital to Jinling (Nanjing), and then papermaking was spread from the Yellow River basin to the Yangtze River basin and Jiangnan area [2]P591.

According to Liu Kaisheng, the paper-making inheritor of Zhubanqiao, as early as the Kangxi period of the Qing Dynasty, in order to take refuge, his ancestor Daren Liew moved his family from Jiangxi to the west of the river. When passing through Zhubanqiao in Langxi Township, Pengshui County, he saw that this grand canyon had mountains and waters, high mountains and lush bamboos, clear rivers between the valleys, and green bamboo forests on both sides, forming a continuous bamboo sea with a length of about 1 kilometers, so he decided to take root for generations. Since then, Cai Lun papermaking of Pengshui Bamboo Banqiao has become an eternal topic. It has a history of 3 years now.

Second, the social and cultural value of Cai Lun's papermaking

1. The production process of retaining traditional culture

Liu's papermaking inherited and developed the traditional process of China's ancient papermaking, passed down from generation to generation, and constantly improved, forming its own characteristics: First, it retained the traditional 72-step papermaking process in Cai Lun. The original paper-making processes generally include beating, seasoning, sizing preparation, slurry feeding, dewatering and forming, squeezing and dewatering, drying into paper, and surface treatment [3]P585. The main technological processes in the bamboo slab bridge are: taking materials (bamboo as the main material and lime as the auxiliary material), making materials (soaking and fermenting), pulping (crushing, stepping on materials, stirring to prepare birch leaves), molding (scooping paper, squeezing dry, polishing and coloring), drying (uncovering, airing) and packaging. Secondly, the traditional paper-making method has been developed. Since 197s, the original sheet size has been changed from 3*5 cm to the current specifications, which has improved the economic value of products. Third, the traditional culture and art are preserved. Before cutting bamboo into the factory every year, Cai Lun, Mountain King Bodhisattva and Land Bodhisattva should be sacrificed, and they should also be sacrificed with their ancestors in traditional festivals such as Spring Festival and Half Moon. Labor songs and folk songs produced in the process of labor are still sung today; At the same time, it still retains a variety of taboos, which increases its mystery and adds more charm. According to Liu Kaisheng in the village, when Cai Lun first invented papermaking in the past, the paper he made was extremely uneven and structurally weak, so it was easy to be torn, and no solution was found for a long time. One night, Guanyin Bodhisattva gave a dream to Daren Liew, asking Daren Liew to add birch liquid (crushed birch leaves) to the pulp to make the paper shape. This is indeed the case, so this technology has become the "patent" of Zhubanqiao people.