2.
refers to the classical schools of thought, e.g. Confucianism rú儒 represented by Confucius kǒngzǐ孔子 and Mencius mèngzǐ孟子, Daoism dào道 by Laozi lǎozǐ老子 and Zhuangzi zhuāngzǐ莊子zhuāngzǐ庄子, Mohism mò墨 by Mozi mòzǐ墨子, Legalism fǎ法 by Sunzi sūnzǐ孫子sūnzǐ孙子 and Han Feizi hánfēizǐ韓非子hánfēizǐ韩非子, and numerous others