Heaven and Earth Society, one of the secret civil societies in Qing Dynasty. It is named after worshipping heaven as father and earth as mother. Also known as Hong Men, commonly known as the Red Gang. At present, there are several different opinions about the time of the establishment of the heaven and earth society, but there is no conclusion. At first, its members were mostly farmers or small-scale craftsmen, small traders, transport workers along land and water transportation and other vagrants without fixed jobs. In the future, the composition is more and more complex, but it is still dominated by the poor at the lower level. The slogans of the Heaven-Earth Society, such as anti-Qing, restoring sight, obeying heaven and justice, robbing the rich and helping the poor, reflected the national concept of the people at that time and the requirements of opposing class oppression.

Triad (English: Triad), also known as Hong Men Triad, is a famous anti-Qing secret organization in history, which began during the reign of Kangxi and Yongzheng in the Qing Dynasty. Nowadays, there is no real underworld. Because many China underworld organizations can be traced back to the Hong Men underworld in the Qing Dynasty, they are now generally used to refer to underworld criminal organizations composed of China people. Triad (English: Triad) was originally a non-governmental organization formed by mutual protection of civic organizations and villagers' organizations in Yong Lian, Wuzhou, Zhaoqing and Foshan in 1830 (Daoguang Decade). After the Opium War, people's thoughts in the Pearl River system in Guangdong changed, especially in the connecting areas of Guangzhou, Foshan, Xiangshan and Zhaoqing. In addition, the rural courage and the rise of Yong Jiao led to the proliferation of armed groups. They joined the Heaven and Earth Society, commonly known as Hong Men, for Hong Men. On the other hand, Hong Xiuquan launched the jintian uprising in Guangxi, which evolved into an "anti-Qing Restoration" organization composed of Hong Rengan, Li, Luo Outline, Chen Kai and others, gathered people to establish the Taiping Heavenly Kingdom, launched an uprising, and called each other Hong Men's children, and carried out the revolutionary deeds now known as the Guangdong Uprising. As early as 1845 (the 25th year of Daoguang), the Hong Kong colonial government banned triad activities at the request of the Qing Dynasty. From 65438 to 0845, the Hong Kong colonial government promulgated the Regulations on Banning Underworld and Other Secret Organizations. After the demise of the Qing Dynasty and the Second World War, triads evolved into a general term for traditional secret societies in Hong Kong. Nowadays, the word underworld is generally used to refer to the underworld organizations in China, and most underground secret organizations in Hong Kong can be traced back to the underworld. For nearly half a century, the gang activities of the underworld include collecting protection fees, selling drugs, money laundering, illegal gambling, running industries and other so-called pornography and drug businesses. Individual members will also commit crimes such as theft, fraud, kidnapping, intimidation and extortion. There are more than 200,000 members of large triad societies in Hong Kong, and 7- 10% of the triad members of most street gangs are active members. If all triads and gangs in Hong Kong are unified, the number will reach more than 500,000, so Hong Kong often confuses triads with triads. Up to now, in Hong Kong, it is also illegal for people who call themselves triad members or members, who are themselves triad members or members, and who use the names and titles of any triad organization to take any initiation ceremony for any triad-related articles (such as flags, decrees, poems, prohibitions, oaths, argots and sacrificial vessels). Many initiation ceremonies contain religious philosophies and terms of Taoism and Buddhism, adopt initiation ceremonies similar to those of Hong Men, and possess offensive weapons. It may violate the Societies Ordinance and commit a criminal offence. Once found, the maximum penalty is 7 years' imprisonment and a fine of 250,000 yuan. Besides, secret societies in Hong Kong have many connections with overseas countries. In view of this, the Hong Kong police crack down on any triad-related activities from time to time.