During the period of Emperor Ling of the Han Dynasty, there was a calligrapher and papermaker named Zuo Bo who once produced "Zuo Bo Paper" which was considered the best at the time. "Zuo Bo (165---226), courtesy name Ziyi, was born in Donglai (now Laizhou), Shandong. ... He was good at making paper at the end of the Han Dynasty, and he was also good at making paper. During the rise of the Han Dynasty, paper was used instead of bamboo slips. In the reign of Emperor He, Cai Lun "Ziyi is particularly good at craftsmanship." Zuobo paper is made from linen and locally abundant mulberry bark. At that time, linen material was first used. Linen material came from clothes used by ordinary people and other hemp products, such as sacks, hemp ropes, hemp shoes, etc. Because hemp material was slightly less tough than leather, later the local abundant mulberry was used. leather raw material, or the two raw materials are proportioned according to the purpose of the paper. Mulberry fiber is the longest among the bast fibers, and its toughness is evident. Although the fiber of linen material is short, it has good water filtration effect. The combination of the two The paper made by fishing is of excellent quality. To this day, Linqu vellum still retains the technique of incorporating some linen materials. During the Tang and Song Dynasties, due to the cultural renaissance and the rapid increase in paper consumption, bamboo paper in the south became popular. Because the raw materials and technology of Zuobo paper were more complicated than bamboo paper, which was not conducive to the development of paper consumption at that time, it became one of the most popular handmade papers in China. A small variety passed down. But its four characteristics of longevity, complexity, antiquity and toughness are also unmatched by other ordinary papers. At its peak in the middle and late Qing Dynasty, there were nearly 2,000 processing households in the county, all of whom relied on this, and their income accounted for 40% of the county's annual tax, which shows the scale of the industry at that time. It is one of the famous local specialties in Linqu's history. With the rapid development of machine-made paper after the founding of the People's Republic of China, Linqu vellum paper faded out of people's sight, and handmade papermaking workshops basically disappeared in the 1970s and 1980s. However, under the painstaking persistence of Lian Enping, the inheritor of Linqu vellum paper, the left-hand papermaking industry has been preserved since 1986. Bo Zhi's hand-made skills have preserved the blood of this thousand-year-old skill.