Two-instrument boxing originated from Zhouyi, and the copula said, "It is easy to have Tai Chi, which is the birth of two instruments." Two-instrument boxing, also known as two-instrument boxing, is based on natural conditions and changes in the universe. After chaos, heaven and earth are like eggs, covered with vegetation. Fog gives birth to Huang Ji, Huang Ji gives birth to Tai Chi, Tai Chi gives birth to two instruments, two instruments give birth to four phases, four directions give birth to five elements, five elements give birth to eight diagrams, and eight diagrams set dry Kun; The two instruments mean that light rises to the sky, yellow sinks to the ground, the universe changes, and everything grows with it. The records of the two instruments can be traced back to the Book of Changes, "It is easy to have Tai Chi, which is to give birth to two instruments." The two instruments are divided into yin and yang, and everything in the world cannot be separated from yin and yang; On the basis of the essence of Taiji, Liangyiquan, Sitong Boxing, Wuxing Boxing and Bagua Boxing, Liangyiquan evolved into' Liangyiquan'.