Seventy-two lines are a general term for various industries. Tao Xingzhi's Automatic School Poetry: "It's strange that there is a school where children teach their children automatically. Mr. Seventy-two lines, if Mr. Wang is not studying, "Seventy-two lines" is an imaginary indicator. Today, people often say that 72 lines or 360 lines are not specific numbers. In fact, the division of labor in social industries has far exceeded the 72nd line. According to Zhou's Qingbo Magazine, the main industries in China in Tang Dynasty were "thirty-six lines", namely: meat shops, palace powder, ready-made clothes, jade articles, jewelry, silk, paper making, seafood, fresh fish, stationery, tea, bamboo and wood, rice wine, ironware, ancient embroidery, needle and thread, soup shops, medicine shops 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, followed by 72 lines, and 360 lines are ten. "It can be seen that' seventy-two lines' is a virtual indicator. Today, people often say that seventy-two lines or three hundred and sixty lines are not specific figures. In fact, the division of labor in social industries has far exceeded the 72nd line. [2]

Jiuliu: The general name of nine academic schools in ancient China, such as Confucianism, Taoism, Yin and Yang, Legalism, Famous Scholars, Mohism, Military Strategist, Miscellany and Peasant School.

Wuhua:

Jin Juhua-a metaphor for a woman who sells tea.

Kapok-a metaphor for a doctor who goes to the streets to treat diseases.

Narcissus-a metaphor for a singer in a restaurant.

Pyracantha-a juggler's metaphor.

Local cowflowers-metaphor for some porters.

Eight doors:

The so-called "eight doors" refer to the businessmen who set up stalls in the market and earn money by glib mouths, namely: gold, leather, signing, hanging, evaluating, organizing, adjusting and willow.

A Golden Gate (a towel)-"Golden Point" is the general name for Jianghu artists to calculate divination by looking at their faces. There are also dumb gold, gnawing gold, gold, Bao Jin, Lao Zhouer and so on.

Two-door skin-"skin" line is the general term for drug trafficking. This business is also called "picking Han's son". According to the different medicinal materials sold, they are called: pick Han, pick Zi Han, pick Zao Chew, pick Zi Han, pick firewood to hang Han, pick General Han, pick whole grain, pick smoked Zi Han and so on.

Three colors-"color" is color. Anyone who juggles is called "bride price", and those who juggle with foreigners are called "color is right".

Four-door crane-a person who practices acrobatics at fairs and temple fairs is called "crane" by Jianghu people. Divided into: support, pull, poke, point, sharp, fishy and so on.

Five comments-those who say storytelling. Those who sing drum books are called "long guys" and those who tell stories are called "short guys".

Six-door group-crosstalk performers. Jianghu people call teasing children with cross talk "Tuan Chun".

Seven-tone-tent and paper. Paper binding, also known as paper binding, paper paste and color paste, integrates paper cutting, painting, straw weaving, bamboo weaving and paste. Buy it back and burn it to the dead when the family has a funeral. In the late Qing dynasty, it was also said that it belonged to opium dealers.

Eight-door willow singing drums. Jianghu people call drum singing "Liu Haihong". There are Fengtian tune, Laoting tune, Xihe tune, Plum blossom tune and Pear blossom tune.