Straw paper, also known as earth paper. The "An County Chronicle" (1991 edition) records: "An County has been producing earth paper for hundreds of years." In the old days, the best straw paper was mostly used for ignition and preservation of fire; coarse paper was used for packaging, such as salt, candy, and Chinese medicine, and was also used for sacrifices and incineration; coarse paper shells were made into boxes to hold clothes, shoes and hats, and some people used them to make paper shells and cardboard; since the reform and opening up, they have been mainly used for sacrifices. During the Republic of China, Heqing, Hua D, Yong'an and other places successively established several straw paper production workshops. In 2008, only Sangzao still had earth paper production workshops in the county; in addition, Sanhe Village, Feishui Town, still had a straw paper production site pool left by a large collective during the ten-year civil strife. The main raw materials for producing straw paper are tender bamboo, yellow bamboo strips and moso bamboo; if coarse paper and coarse shell paper are to be produced, rice straw, sedge straw and wheat straw are also required (in order to reduce costs and increase varieties, straw paper workshops generally produce coarse paper and coarse shell paper). In addition, quicklime and alkali are required for the fermentation of bamboo and grass materials, and pine roots, reed roots and tung hemp tree flowers are used to make slippery medicine. Generally speaking, every 100 jin of raw materials (including auxiliary raw materials) can produce about one bundle of straw paper, weighing about 78 kilograms. The production of straw paper mainly requires the following equipment and facilities: material pond; dry mill; pulp trough; Lianzi; paper tray; drying field; storage room. The process of producing straw paper is relatively complicated: preparing materials; soaking materials; washing and grinding bamboo materials; producing slippery medicine; scooping paper; drying; bundling and storage; residue treatment. In the past, the best straw paper was mostly used for ignition and preservation of fire; coarse paper was used for packaging, such as salt, candy, and Chinese medicine, and was also used for sacrifices and incineration; coarse paper shells were made into boxes, which could hold clothes, shoes and hats, etc., and some people also used them to make paper shells and cardboard; since the reform and opening up, it has been mainly used for sacrifices. The main raw materials for producing straw paper are young bamboo, yellow bamboo strips and moso bamboo; if you want to produce coarse paper and coarse shell paper, you also need rice straw, sedge straw and wheat straw (in order to reduce costs and increase varieties, straw paper workshops generally produce coarse paper and coarse shell paper). In addition, quicklime and soda ash are required for the fermentation of bamboo and straw materials, and pine roots, reed roots and tung tree flowers are used to make slippery medicine. Generally speaking, every 100 jin of raw materials (including auxiliary raw materials) can produce about one bundle of straw paper, weighing about 78 kilograms. Information source: Mianyang Intangible Cultural Heritage Protection Center Information source: Mianyang Intangible Cultural Heritage Protection Center