Xinyiquan or Xinyi Liuhe Quan, is one of the most outstanding internal martial arts in the Chinese martial arts. For hundreds of years, this boxing has been kept secret within the Dai family in Qixian, Shanxi province. It has a long history, rich content, and mysterious and unfathomable techniques, combining the theories and techniques of Buddhism, Taoism, and Confucianism, making it a scientific martial art that focuses on both internal energy and external strength training. The techniques follow the objective rules of nature, based on the theory of the balance of Yin and Yang, and the theory of the five elements, which are the essence of Taoism.