Who are the "upper nine streams" and "lower nine streams" mentioned by the ancients?

Many people have heard of the saying that the three religions are relatively easy to understand, referring to Confucianism, Buddhism and Taoism, which is also commonly known as Buddhism. If you have nine streams, you will get more points. Jiuxi is divided into Shangjiuxi, Zhongjiuxi and Xiajiuxi. Together, the three involve about 27 occupations. The first to bear the brunt is the 96 th grade. Shangjiuliu is very unified in the old saying of China. People agree that the upper nine streams mainly include emperors, some able people and sages, and some choose to live in seclusion. It also includes children's immortals and literati among some disciples, as well as our social class division, agriculture, industry and commerce. However, Zhong Jiuliu includes those who take a skill as their profession, such as ancient doctors and fortune tellers, including some painters, some scholars who read books, people who live by their own piano skills, and monks, Taoist priests and nuns. As for the inferior people, it is obvious that their division of the inferior people is the kind of people who were thought to be unable to get elegant lectures in ancient times. For example, some ancient wizards, and even some people who get economic benefits by selling their bodies. Everything else is magic wand. The magic wand here is not a fortune teller in the middle reaches of the ninth stream, but the kind of person who treats others through some absurd things. And the night shift. There are also people who shave their heads, including those who help others get married, singers and singers. Some beggars and some sugar sellers were considered inferior in ancient times. Of course, with the development of society today, people can't divide so much. As the saying goes, 360 lines, each line will be the best. As long as you are innovative and willing to work hard in your own field, you will probably become the greatest existence in this field. Of course, in contrast, if you don't want to do it, no matter what you do, others will look down on you more or less.