The art of making paper mulberry paper in Beizhang Village, Xinglong Township, Chang'an District, Xi'an City began in the Han Dynasty and has a history of nearly 2,000 years. The main raw material used for papermaking in Beizhang Village is the bark of the mulberry tree (the mulberry tree is also called the mulberry tree). This historical paper made by Beizhang Village is called hemp paper, which is divided into black and white. The paper made from the bark of the mulberry tree in winter is white, while the paper made from the bark of the mulberry tree in spring and summer (called bud bark) is black. The main procedure of papermaking is: first screen the collected bark of the mulberry tree, and then soak it in clean water. Then soak the soaked bark in lime water for 2-3 days, then take it out of the lime water and steam it in a large pot for a day and a night to soften the bark fiber thoroughly, then take it to the river to thoroughly wash off the lime and other impurities, then put it on a stone mill to grind it into pulp, chop the pulp with a guillotine, and press it into a loose state under the tread of a large wooden pestle, then put it in a stone jar and pound it with a stone hammer to make the plant fiber softer and finer, and finally put it in a stone trough to make it into uniform pulp. After the pulp is generated, it enters the papermaking process, and a bamboo curtain is placed on a rectangular wooden frame, and the small bamboo curtain is clamped with two small wooden sticks. This is the main tool model for papermaking. The papermaker holds both ends of the wooden frame with both hands, first inserts one end of the bamboo curtain slightly tilted into the pulp tank, picks it up, and then slowly sinks the other end completely. After about 5 or 6 seconds, quickly pull up the bamboo curtain, turn it upside down and gently lift it up, and a piece of white original paper is made. In this way, the paper is stacked and pressed together layer by layer. The large stack of wet paper copied out must be pressed with wooden boards and large stones for more than ten hours to squeeze out the moisture. The last process is to dry the paper. The wet paper is peeled off one by one and pasted on the wall to dry. This process is very critical. Not only must it be careful, but it also requires skills. The paper must not be torn or curled. After the paper is completely dried, the paper is cut into finished products and finally bundled for sale. The tools for papermaking seem very simple, but the process of papermaking is very complicated. It generally goes through 10 major processes and 72 minor processes, and it is all done by manpower. The labor intensity is high. About 13 or 14 knives of paper (100 sheets/knives) can be made every day. In May 2007, the mulberry paper making technique of Beizhang Village was included in the first batch of intangible cultural heritage list of Shaanxi Province; in June 2008, it was identified as the first batch of intangible cultural heritage of Xi'an City and the second batch of national intangible cultural heritage.