Their ideas mainly originate from Confucianism founded by Confucius and the "Six Classics" advocated by Confucianism.
In terms of the view of nature, the theory of cosmology was proposed using the concept of yin and yang in the "Book of Changes"; and based on the "division of nine states" in "Shang Shu Yu Gong", the theory of "Great Nine States" was proposed, which believed that China It is the Shenzhou of Chi County, with Small Kyushu inside and one of the "Great Kyushu" outside (Hu Shi once greatly praised this geographical concept of the Yin and Yang family in his "Chinese Medieval Intellectual History"); in terms of historical perspective , transformed the Five Elements view in "Shangshu·Hongfan" into the theory of "Five Virtues Ending and Beginning" (discussed below), and believed that the rise and fall of dynasties in the past were dominated by the Five Elements; in political ethics, it also "stops and begins" Benevolence, righteousness, frugality, and charity from the emperor and his ministers, superiors and subordinates, support the Confucian theory of benevolence and righteousness. At the same time, it is emphasized that "due to the great harmony of yin and yang", it contains certain knowledge of astronomy, calendar, meteorology and geography, which has certain scientific value.