What are the four important stages of China's ancient philosophy?

The first stage: Pre-Qin philosophy was the peak of China's philosophy and culture, and the development of philosophy in the later period was unparalleled. Pre-Qin philosophy not only has a clear explanation of groups, but also has a deep discussion of individual life;

The second stage: feudal philosophy changed from the unification of Qin Shihuang to the Westernization Movement, and China was plunged into chaos in 500 years and chaos in 300 years. The horizontal development of philosophy is stagnant and stays in the discussion and research within the framework of Confucianism.

The third stage: Chinese and western philosophy from Westernization Movement to May 4th Cultural Reform. China's philosophy was greatly subverted by western philosophy, and Chinese people began to think about the defects of China's philosophy, trying to imitate the western constitutional monarchy through "introduction of things" (represented by the Westernization Movement), "system reform" (represented by the Reform Movement of 1898) and "introduction of culture" (held high by the May 4th Movement).

The fourth stage: Chaos philosophy completely destroyed China's traditional philosophy from the May 4th Movement to the Cultural Revolution in ten years.

The fifth stage: materialist philosophy. Since the Cultural Revolution, China's traditional philosophy, which has been questioned for ten years, gradually declined after the baptism of the May 4th Movement and World War II, and the Cultural Revolution further destroyed the traditional philosophical world outlook. China's philosophy has developed to the stage of materialism philosophy, which takes borrowing western society, economy, science and system as the essence and packages China's traditional philosophy.