Detailed explanation of Seventy-two Lines \x0d\ 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, rice wine, iron, ancient embroidery, needle and thread. 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. \x0d\ China has a famous saying-"360 lines, each line is the best". I don't know how many years this proverb has been circulating, but it is a household name, known to all women and children. The name of \x0d\ line began in the Southern Song Dynasty. The so-called "360 lines" refers to all walks of life, that is, social posts. Including meat shop, seafood shop, fresh fish shop, restaurant, rice shop, sauce shop, palace powder shop, flower shop, tea shop, soup shop, medicine shop, clothing shop, silk shop, embroidery shop, needle and thread shop, leather shop, binding shop, firewood shop, coffin shop, old shop, autopsy shop and net shop. \x0d\ Tsui Hark, a Qing man, said in "Clearing Money": Thirty-six travelers have their own careers. About its division of labor, it is 36 lines; Second, it is seventy-two lines; Ten is 360 lines.