According to Qingbo Miscellaneous Records, the main industries in China in the Tang Dynasty were "Thirty Six Lines", namely: butcher shop, palace powder, ready-made clothes, jade, jewelry, silk, paper, seafood, fresh fish, stationery, tea, bamboo and wood, rice wine, ironware, ancient embroidery, needle and thread, soup shop and so on. Tsui Hark said in Clearing Money, Agriculture, Industry and Commerce: "Thirty-six walkers, various occupations. As far as the division of labor is concerned, it is 36 lines, 72 lines, and 360 lines ten times. " It can be seen that "72 lines" is a virtual indicator, and the 72 lines or 360 lines that people often say today are not specific numbers. The above is the traditional view of all walks of life. In fact, the division of labor in social industries has far exceeded the 72nd line. Grandfathers are pioneers in their respective industries. For example, the woodworking industry worships Luban, the pharmaceutical industry worships Shennong and the fishery worships Fuxi. Grandpa is an enthusiastic supporter of this industry. For example, Tang, the founder of Liyuan, and the founder of ham industry. Grandpa is a skillful craftsman in this industry. Such as Wu Daozi, the founder of painting, and Qiu Changchun, the founder of jade. Grandpa is only symbolic and has nothing to do with the industry. For example, the shoemaker offered sacrifices to Sun Bin, castrated him, and worshipped the imperial doctor Hua Tuo. Although some people do have the merit of starting a business, they are not worshipped by their ancestors. For example, the founder of Zhacaiye is said to be a monk who advocated hanging lanterns in the Tang Dynasty, but the ancestor worshipped by Zhacaiye is Lu Ban.