Text/Detailed Explanation The Hong Men Heaven and Earth Society, also known as the "triad society", was a folk association organization in the Qing Dynasty, but opinions on the origin of the Heaven and Earth Society have always been different. According to the introduction of the older generation of democratic revolutionaries, such as Sun Yat-sen and Tao, the Hong Men Heaven and Earth Society was established by the adherents of the Ming Dynasty to fight against the Qing Dynasty and regain sight. It is the result of the sharp struggle of ethnic contradictions between Ming and Qing Dynasties. It originated in Zhangzhou, Fujian Province, and was initiated by Ryan, the Red Second Monk in Zhangpu County. It is called "Heaven-Earth Society", which means "One worships heaven as the father and the other worships the earth as the mother". In the meeting, Hong Men was commonly known as "",with "5: 2 1" as the code word. There is a poem that says: "The flood floats in the world", and "The blood alliance was originally named Hong", which means "the children of Hong family". Hong Men Heaven and Earth Society took anti-Qing as its banner, and its leader, Hong Ying Jinshi, grew to tens of thousands by relying on anti-Qing famous Shi Kefa and Huang Degong. Later, it was defeated by the Qing soldiers. Hong Xu, the son of Hong Ying, and his master Cai Dezhong led the remnants to Zheng Chenggong and hid in Taiwan Province, with the intention of making a comeback and reviving Hong Men. In order to strengthen unity and fight against the Qing Dynasty, Zheng Chenggong founded the Golden Mountain Mingyuan Hall on 166 1. He became a half-brother with all the soldiers, and took "Xin Yi, a Ming fu" as the code word, meaning "I have a full understanding of the Ming Dynasty", which was the beginning of Hong Men's establishment of a guild hall. The reason why Zheng Chenggong revived the Hong Men Gang was that he respected Emperor Zhu Yuanzhang of Hongwu and was busy with Qing soldiers and barbarians, which was of positive significance to the national revolution. By 1749, Hong Men Heaven and Earth Society was famous in southeast summer under the auspices of its founder Chen Jinnan. Later, under the auspices of Su, a master of the Tang Dynasty, all mountain religions gathered in Huizhou Temple, Guangdong Province, and the organization was named "Trinity", that is, "Heaven is the father, the earth is the mother, and the sun and the moon are sisters", which means good weather, geographical location and harmony between people. After that, a large-scale vigilante group opposed the Qing Dynasty, winning Lien Chan's victory, and the seven southern provinces shook the East. Seeing that the "triad" army was strong and hopeless, the Qing army governor Wang of Sichuan sent two spies, Fu and Tian, to surrender as internal forces. The two armies fought in Chongqing, and the "three in one" army was defeated. Since then, the remnants of the "underworld" have spread all over the country, and their influence has spread all over mainland provinces and ports in Southeast Asia. Under the banner of Hong Men's anti-Qing Dynasty and regaining sight, various mountain halls held uprisings in succession, among which Jiuhuashan, Red Gun Club, Broadsword Club, Small Knife Club, Double Knife Club, Three o'clock Club and Chuanshe Club had the greatest influence. During the whole Revolution of 1911, the "Hong Men Heaven-Earth Society" made contributions and played an important role in overthrowing the Qing Dynasty. After the collapse of the Qing Dynasty, the "underworld" lost its revolutionary objects and lofty political ideals, and gradually evolved into a group engaged in underworld crimes and became a global evil export organization. At present, the underworld has become synonymous with China's underworld criminal organizations, just as the mafia has become the collective name of the underworld organizations in Italian, American and other western countries. Within the Hong Kong Police Force, there is a department called "O Kee", whose full name is: Organized Crime and Triad Bureau.