What did the Yang Zhongying family learn?

On the view of nature, Yin and Yang scholars put forward the theory of universe evolution by using the concept of Yin and Yang in Zhouyi. Based on the division of Kyushu in Shangshu, this paper puts forward the theory of "Great Kyushu", and holds that China is a red China with a small Kyushu inside and one of the "Great Kyushu" outside. In the view of history, the concept of five elements in Shangshu has been transformed into "the end of five virtues", also known as "the turn of five virtues" and "five virtues" refer to the attributes of the five elements, namely, earth virtue, wood virtue, benevolence virtue, water virtue and fire virtue. According to the theory of Yin and Yang, everything in the universe corresponds to the five elements, and each has its own virtue, and the operation of heaven, the change of the world and the replacement of dynasties are all the results of the "five virtues transfer". Its purpose is to show the social changes at that time. In terms of political ethics, yin and yang scholars believe that "benevolence and thrift are the only thing, and the monarch and the minister are the six relatives", and agree with the Confucian theory of benevolence and righteousness. At the same time, it is emphasized that "harmony due to yin and yang" contains some knowledge of astronomy, calendar, meteorology and geography, which has certain scientific value. There were still some Yin and Yang families in the early Han Dynasty. After a hundred schools of thought contended in Emperor Wu of the Han Dynasty, some contents were integrated into the Confucian ideology, and some contents were absorbed by primitive Taoism. As an independent school, the family of Yin and Yang disappeared. Representative figures: Zou Yan Zou Yan (about 305 BC to 240 BC), a native of Qi State (now Linzi, Zibo City, Shandong Province), was a representative of the Yin and Yang families. Because of his erudition, he was called Tan, also known as Zou Zi. His deeds recorded in the old history are false, but it is certain that he came from the late Warring States period. Zou Yan was studying, and he valued learning more than Qi. Welcome to Wei and the suburbs. When I arrive in Zhao, treat me as a guest and host. When I arrived in Yan, I personally swept the dust for him, listened to his lectures, built the Kersh Palace for him, and held a ceremony to accept disciples. Therefore, it is speculated that he may have died after the battle of Changping. Zou Yan's works "Zou Zi" and "The End of Zou Zi" are said to have hundreds of words, but they have long been lost. At present, only some paragraphs in Lu's Spring and Autumn Annals and Sima Qian's Historical Records can show his thoughts.