 The Cantong qi and its tradition use several sets of emblems that represent different aspects of the relation of the cosmos to the Dao. The main set is formed by four trigrams of the Book of Changes, namely Qian ☰, Kun ☷, Kan ☵, and Li ☲, which represent the modes taken on by the Dao in its self-manifestation. Qian stands for the active (Yang) aspect of the Dao, and Kun stands for its passive (Yin) aspect. Their permanent conjunction in the precosmic domain gives birth to the cosmos. The Yang of Qian ☰ moves into Kun ☷, which becomes Kan ☵; in response, the Yin of Kun ☷ moves into Qian ☰, which becomes Li ☲. In the cosmos, therefore, the Yin contains True Yang (the inner solid line of Kan ☵), and the Yang contains True Yin (the inner broken line of Li ☲).