The Rise of Chinese Underground Banking in Global Money Laundering

Carman Yu is an Associate Analyst II at AML RightSource. We encourage our team

members to share their insights and expertise by contributing to our content library. 

Two Observations, One Question

Before moving into AML, I worked in wealth management in Hong Kong, supporting clients with strong connections to mainland China. Very early on, I noticed something that did not fully make sense to me. There was always a strong demand to move money offshore.

At the same time, China has strict controls on outbound transfers, limiting how much money individuals can formally move out of the country each year. Yet somehow, large amounts of money still found their way into Hong Kong. Funds arrived. Investment accounts were funded. Property purchases have moved forward. From a front-line perspective, things worked.

And honestly, in wealth management, the focus is usually on serving clients and attracting assets. If the money arrives and the required checks are completed, people do not always stop to ask deeper questions. But one question stayed in the back of my mind: How is this money moving so smoothly when the formal system is so restricted? At the time, I did not fully understand the answer.

Years later, after moving to Canada, I started seeing something very similar again—but this time, much more openly. In Chinese social media groups and private chats, I would regularly come across posts like:

• “Offering CAD in Canada, looking for RMB in China”
• “Local exchange available, fast settlement.”

At first glance, it looks harmless. Almost practical, even. Two people in different countries help each other exchange values without going through banks or paying international transfer fees. But the more I looked at it, the more familiar it felt. The same question came back again: If money is not moving across borders through the banking system, how is the value still arriving exactly where it needs to go? That was when I started connecting what I had seen in Hong Kong with what I was now seeing in Canada.

Value Moves Even When Money Does Not

What I observed in Hong Kong and later in Canada are not separate situations. They are different versions of the same underlying system. In Hong Kong, the movement was less visible and embedded within financial activity. In Canada, it was informal and openly discussed online. But structurally, the mechanism is very similar: value is transferred across borders without funds moving through the formal financial system. This is one of the foundations of underground banking networks.

How the System Actually Works

At its core, the process is surprisingly simple. Someone in China gives RMB (Yuan) to a broker or intermediary. Instead of sending money overseas through a bank transfer, the intermediary finds another party in a different country who already holds foreign currency, such as USD or CAD. That foreign currency is then provided locally to the recipient abroad.

No direct international transfer takes place. Instead, two domestic transactions are matched together behind the scenes. From a regulatory perspective, this becomes difficult to track because the value transfer is fragmented. There is no single transaction clearly showing money leaving one country and arriving in another. The money does not move across borders in the traditional sense. But the value does.

Why These Networks Grow So Easily

What makes underground banking so effective is that it is built around real demand. Many people genuinely want faster or more flexible ways to move money internationally. Some may be students, families supporting relatives overseas, or individuals trying to access offshore investments.

Not everyone involved sees themselves as doing something risky. At the same time, the structure itself naturally avoids many traditional controls. Funds may be settled locally in cash or via digital wallets such as WeChat Pay or Alipay, rather than through formal banking channels. Communication also happens quickly through private chats and social media groups. Counterparties can be matched within minutes without formal infrastructure. The system is low-cost, flexible, and efficient. That is part of what makes it difficult to contain.

The Challenge from an AML Perspective

What makes this particularly challenging from an AML perspective is that much of the activity is intentionally designed to stay outside the traditional financial system. In many situations, financial institutions only see fragments of the picture. An account may suddenly receive funds without any visible transfer pathway. A client may have access to significant offshore liquidity that does not align with their profile.

Transactions may appear ordinary individually, but unusual when viewed over time. The absence of visible transactions does not mean there is no risk. This is where traditional transaction monitoring becomes less effective. Most monitoring systems are designed to identify suspicious movement within the banking system. But underground banking often operates by reducing visibility altogether.

Looking Beyond Individual Transactions

Over time, I have come to feel that detecting this type of activity requires a different mindset. The focus cannot be limited to single transactions or isolated alerts. Instead, it becomes more important to consider the broader context: Does the client’s financial behavior make sense given what is known about them? Is there a reasonable explanation for how funds are being accessed across different jurisdictions? Does the activity align with the customer’s profile over time?

There are no perfect answers to these questions. Some people using these channels may simply be trying to work around restrictions or avoid high transfer costs. Others may be connected to activities with much higher risk, including money laundering, tax evasion, or circumventing capital controls. That overlap is what makes these systems so difficult to assess clearly.

Conclusion

Underground banking networks represent more than just another money laundering technique. They reflect a broader shift in how value moves globally, often outside the visibility of the formal financial system. Looking back, I now realize the question I first noticed in Hong Kong never really disappeared. I started seeing different versions of the same answer in different countries.

Across both institutional environments and informal markets, the pattern remains consistent: Cross-border value transfer no longer depends on cross-border fund movement.

And for AML professionals, that may be one of the most important challenges to understand going forward.