The schools of thought contending referred to the various schools of thought during the Warring States Period in ancient China, such as Confucianism, Taoism, Mohism, Legalism, militarism, and the famous schools. The school that did not belong to the Hundred Schools of Thought Contending referred to the School of Lu in the Spring and Autumn Period of ancient China. The main idea of this school was the "Doctrine of the Middle Way", which emphasized the balance and harmony in dealing with problems. It was different from the thinking of the Warring States Period.