China’s Underground Banking System (CUBS), often referred to as Feiqian or “Flying Money”, is one of the world’s largest informal financial networks.
While largely unknown outside financial crime, banking and compliance circles, these networks play an important role in moving money across borders without relying on traditional banking systems.
The system can be used for legitimate purposes such as family remittances, currency exchange and international business transactions. Because it operates outside traditional banking systems, it has also attracted attention from regulators, financial institutions and law enforcement agencies around the world.
Understanding how these networks operate provides valuable insight into global finance, international trade and modern financial regulation.
What Is the Chinese Underground Banking System?
The Chinese Underground Banking System is an informal network of brokers, agents and businesses that facilitate the transfer of value between countries without necessarily moving money through conventional banking channels.
Rather than physically transferring funds across borders, participants rely on trusted networks that record debts and credits between agents. The result is that money appears to move internationally even though the actual funds often remain within their respective countries.
This approach allows transactions to occur quickly while avoiding many of the delays and restrictions associated with formal international banking.
Why Does It Exist?
One reason the system developed is China’s strict capital control framework.
Chinese citizens and businesses face limits on how much foreign currency can be exchanged or transferred abroad through official channels. These controls were designed to help manage the country’s financial stability and foreign exchange reserves.
As international trade expanded and Chinese communities grew around the world, informal alternatives emerged to meet demand for faster and more flexible cross-border transactions.
For many users, underground banking networks offered:
- Faster international transfers
- Access to foreign currencies
- Alternative remittance channels
- Services in regions with limited banking access
While these services may be legitimate, operating outside formal banking regulations creates challenges for regulators and law enforcement agencies.
How Does the System Work?
At its core, the Chinese Underground Banking System functions through a network of trusted intermediaries.
Instead of sending money directly across borders, local agents coordinate with partners in other countries who make equivalent payments to recipients.
| Step | Action |
|---|---|
| 1 | Customer gives money to a local underground banking agent |
| 2 | Agent records the transaction and contacts a partner overseas |
| 3 | Overseas partner pays the recipient locally |
| 4 | Agents later settle balances through separate transactions |
This process allows value to move internationally without a traditional international wire transfer taking place.
The Role of Mirror Transactions
A common feature of these networks is the use of mirror transactions.
For example, a customer in China may wish to move funds to another country. Rather than physically transferring money overseas, a local agent receives the funds while a partner abroad releases an equivalent amount to the recipient.
The two agents then adjust their ledgers accordingly.
To settle outstanding balances, networks may use a variety of mechanisms including:
- Trade transactions
- Offshore accounts
- Currency exchanges
- Cryptocurrency transfers
- High-value goods trading
This system reduces the need for large cross-border money transfers while maintaining the appearance of liquidity across the network.
How Is It Different From Hawala?
The Chinese Underground Banking System is often compared to the Hawala system used in parts of the Middle East, Africa and South Asia.
Both systems rely heavily on trust and reputation rather than formal banking infrastructure. Both also use ledger-based settlements rather than direct movement of cash across borders.
However, there are notable differences.
| Chinese Underground Banking System | Hawala System |
|---|---|
| Often linked to commercial businesses | Often based on personal relationships |
| Frequently connected to trade activity | Generally less connected to formal business structures |
| Can involve shell companies and import/export firms | Typically operates through family or community networks |
| Often larger and more structured | Usually more decentralised |
These differences can make Chinese underground banking networks particularly difficult to identify and investigate.
Why Authorities Monitor These Networks
Because transactions occur outside traditional banking channels, many of the safeguards used within regulated financial systems may be absent.
Formal banks are generally required to conduct:
- Customer identity verification
- Anti-money laundering checks
- Suspicious activity reporting
- Transaction monitoring
Underground banking networks may not be subject to these same requirements.
As a result, authorities monitor these systems because they can potentially be used to:
- Launder criminal proceeds
- Evade sanctions
- Circumvent capital controls
- Move illicit funds internationally
- Conceal beneficial ownership
At the same time, it is important to recognise that participation in an underground banking network does not automatically indicate criminal activity.
Common Indicators of Underground Banking Activity
Financial institutions and investigators often look for patterns that may suggest the use of informal banking networks.
Potential indicators include:
- Rapid movement of funds into and out of accounts
- Low account balances despite high transaction volumes
- Repeated transactions involving unrelated parties
- Unusual international trade payments
- Frequent currency conversions
- Multiple accounts controlled by the same individual or business
- Inconsistent invoices or trade documentation
These indicators do not prove wrongdoing but may justify additional scrutiny.
Why It Matters
The Chinese Underground Banking System highlights how financial networks can evolve outside traditional banking infrastructure. Developed to meet demand for cross-border transactions, these systems demonstrate how value can move internationally through trusted intermediaries rather than conventional bank transfers.
As international trade and global migration expanded, informal transfer networks continued to develop alongside formal financial institutions. Their existence illustrates the continuing demand for fast, flexible and accessible methods of moving money across borders.
Understanding how these systems operate provides useful insight into international trade, capital controls, financial regulation and the challenges of monitoring cross-border financial activity in a globalised economy.
For businesses, financial institutions, researchers and policymakers, the Chinese Underground Banking System remains one of the most significant examples of large-scale informal finance operating in the modern world.
Sources: THX News, U.S. Department of Homeland Security, Homeland Security Investigations, and U.S. Senate Caucus on International Narcotics Control.
Prepared by Ivan Alexander Golden, Founder of THX News, an independent news organization delivering timely insights from global official sources. Research combines AI-assisted analysis with human-edited accuracy and context.
