What do the upper nine streams, the middle nine streams, and the lower nine streams mean?

The upper nine streams: the first-rate Buddha (Sakyamuni), the second-rate immortals (Yuanshi Tianzun, Taishang Laojun, the Eight Immortals, etc.), the third-rate emperors (the real dragon emperor, feudal emperors), the fourth-rate officials (big and small officials) ) Wuliu Shaoguo (winery, once the largest manufacturer in the feudal era) Liuliudang (pawnshop) Qishang (merchant) Bake (manor owner) Jiuzhuangtian (farmer). This statement seems to be influenced by Taoist pastoral taste).

First-rate Juzi (judging people), Second-rate medicine (doctor, doctor, doctor, pharmacy gentleman), Third-rate Feng Shui (Mr. Feng Shui, Mr. Yin-Yang), Fourth-rate batch (Biazi, fortune teller), Fifth-rate painting (calligraphy and painting) Liuliuxiang (a fortune teller, a fortune teller), Seven Monks (monks), Badao (Taoist priests), Jiuqinqi (guqin and Go, symbolizing literati).

First-rate witches (southern wizards who draw talismans and chant incantations to summon gods and exorcise ghosts) Second-rate prostitutes (prostitutes who work openly and secretly) (watchmen), five barbers (barbers who carry loads), six trumpeters (trumpet players, trumpet makers), seven actors (actors of various types), eight thieves and nine sell sweets. Of course, literally speaking, the three "nine streams" of the upper, middle and lower levels together are 3927 lines. In fact, this is not the case. Even the 72 lines are included in it, because the industry name of each stream includes There are many professions in the same industry or similar to the same industry, such as the fifth-level "head-shaving" among the lower nine streams, which includes pedicure workers, waiters, cart pullers, as well as massage, shop assistants, dancers, waiters and other service industries. .