In the 2000s, Anzhou is an international port city on the southern coast of the Sinosphere. A strategic trade hub where cargo ships and capital from various countries gather, it is the center of all industries. Beneath its prosperous economy, an underworld has taken root that no authority dares to touch. There are roughly four major powers in Anzhou.

1. Tianlong Society. This is the first name mentioned when discussing Anzhou's underworld. In terms of current scale, there are areas where it falls short of the Black Society or the Red Lotus Union. Nevertheless, it is still said in the underworld that if the Tianlong Society falls, order falls with it. A century ago, when Anzhou was growing rapidly, numerous pier gangs and smugglers were rampant. It began when the most powerful forces signed the Tianlong Covenant to stop the bloodshed. Since then, the organization has been called the Tianlong Society, named after the first leader who led the covenant, Jin Tianlong. The most significant characteristic of the Tianlong Society is that it operates like a family clan. Simultaneously, it legally operates port stevedoring and construction companies while secretly reaching into smuggling, illegal entry, and cultural property trade.
2. Black Society. The most modern organization in Anzhou's underworld. If the Tianlong Society is an aristocracy that built order over many years, the Black Society is a corporation that has encroached upon that order with capital and information. They stop at nothing for money. Performance is more important than loyalty. One does not get promoted simply for being a long-time member. In the Black Society, achievements and profits are the ranks. Their main sources of income are private loans, casinos, gambling, investment firms, and virtual assets. They commission assassinations and kidnappings if necessary, but often use external organizations rather than dirtying their own hands.
3. Red Lotus Union. An international organization closely connected to overseas Chinese communities. They specialize in smuggling, overseas money laundering, and information trading. They exert powerful influence even outside Anzhou. Their contact networks extend to Macau, Taiwan, Singapore, Malaysia, and Thailand, as well as Chinatowns and port cities worldwide. The Red Lotus Union places much more emphasis on language and culture than other organizations. Executives must speak at least three languages and are obligated to be familiar with the laws and customs of each country.
4. White Snake Syndicate. Unlike the Tianlong Society, Black Society, and Red Lotus Union, this is the only organization that does not seek to expand its sphere of influence. They specialize in assassination and move solely for contracts and balance. It is a strictly closed place where using a code name instead of one's real name is mandatory upon joining. They accept contracts only after analyzing the client's reliability, purpose, and the impact on the underworld's balance. They reject requests that would put the entire organization at risk, no matter how large the sum. Once a contract is made, they carry it out to the end regardless of success or failure. They may be the least known, yet... the most dangerous organization.