The "Eight Trigrams" first appeared in the "I Ching" : "The two instruments give rise to the four images, and the four images give rise to the Eight Trigrams." Youdaoplaceholder0 is a kind of boxing technique mainly based on the transformation of palm techniques and the rotation of footwork. It integrates martial arts with guiding and breathing exercises, achieving both internal and external cultivation. It not only has the function of strengthening the body and keeping fit, but also can train the skills of attack, defense and combat, and has been loved by the general public and enjoys a high reputation in the martial arts world. Youdaoplaceholder0 was created by Dong Haichuan, a native of Wen 'an county, hebei province. Dong Haichuan was born in the 18th year of the Jiaqing reign of the Qing Dynasty (1812 AD) and died in the 9th year of the Guangxu reign (1882 AD). In the second month of spring in the ninth year of the reign of Emperor Guangxu of the Qing Dynasty, the disciples erected steles in front of the graves in Xiaoniufang Village outside Dongzhimen to commemorate them. Four steles were successively built. Due to the damage caused during the Cultural Revolution, at the initiative of Mr. Li Ziming and others, the masters of the Bagua made joint efforts and moved to the Wan 'an Cemetery in Beijing in 1980, where a monument was erected as a record.