Abstract: Wang Chongyang was born in the late imperial Bei Song period, lived in Shaanxi. The second master of quanzhen Daoism Shi Tai was also Shaanxinese., According to these geographical relations, it can be said that Zhang Boduan's Wuzhen pian(悟真篇)and his idea of the Synthesis of the Three Teachings should have a profound impact on Wang Chongyang's inner elixir practice. However, Wang Chongyang and his disciples qizhen(七真)deliberately avoided Zhang Boduan when referring to the original of quanzhen pai(全真教), and perhaps it is to reserve the space where beizong(北宗)and nanzong(南宗)dispute. The inner elixir practice of Wang Chongyang was to divide the jing, qi, and shen into the innate and acquired aspects, with the innate one as zhen yang(真陽), as the external medicine, used to incarnate the zhen yin(真陰)and internal medicine made by the Jingqi God in the incarnation, so as to become a chunyang ti(純陽體)(pure yang body). On the theory of Synthesis of the Three Teachings, Zhang Boduan cultivated spiritual nature through Buddhism, but for the inner elixir practicing, he used Daoist methods. Compared to Zhang Boduan, Wang Chongyang combined the two religions, and focus on Daoism among the Three Teachings, and his thought was represented by Wupian lingwen zhu(五篇靈文注).

Key words: Wang Chongyang, Inner elixir, Synthesis of the Three Teachings, Xiantian yiqi(先天一炁)