What is the principle of "two paintings first, one painting not"?

The principle of "pumping twice first, pumping once is not smooth" is as follows:

1. Publish the list of freshmen and teachers first;

2. Parents' representatives draw lots to determine the teachers in each class;

3. Once confirmed, no class may change students and teachers.

The lottery ticket is introduced as follows:

Drawing lots is a folk custom in China, and it is also one of the forms of divination. At present, Taoist temples, temples and folk temples have mostly placed sign boxes for people to draw and ask for directions. Like gossip, drawing lots is a popular forecasting method for ancient people in China to judge good fortune and bad fortune. The basis for judging good or ill luck is the number of poems signed and the allusions of poems signed.

Of course, the lottery has a strong mystery, which includes the subjective speculation of the lottery players. It is an idealistic thing, and we don't need to talk about it here. But every sign must be signed, and the signed poem is an allusion, and these poems and allusions are created by ancient literati.

The content is rich and colorful, including many truths of theology, literature, history, religion and philosophy, which we have to explore and study. Therefore, in order to further explore and study "lottery culture", it is necessary for us to talk about the prediction methods and related issues in "lottery".

Yin and Yang are introduced as follows:

What is Tao? Laozi said, "Tao can be Tao, but not surprising." "Yi" says: "One yin and one yang are the Tao." People can get a self-evident explanation of this sentence from different angles, so we might as well try another explanation.

From the perspective of system theory, "Tao" is a big system. Under this big system, there are two opposing systems, one is "Tao" system, the other is abnormal Tao system and Yin system. Therefore, in the study of China's cultural history, "Tao" can be regarded as the overall system of China's entire traditional culture.

Lottery fever is introduced as follows:

The prosperity of contemporary "lottery fever" has both historical and practical reasons, namely, political and economic influence and ideological and cultural factors. This requires in-depth and meticulous analysis of seeking truth from facts.