China: The World's Largest Crypto Ban and Most Advanced CBDC

China’s approach to cryptocurrency and digital assets is the clearest expression in the world of what a state-controlled digital monetary system looks like. China has banned private cryptocurrency completely and is building the world’s most advanced government-controlled digital currency. These two facts are not in tension. They are the same policy — a coherent strategy of monetary sovereignty in the digital age.

The Ban’s History: Progressive Restriction to Total Prohibition

China did not move immediately to a total ban. The progression was graduated and took nearly a decade. The People’s Bank of China (PBOC) issued initial restrictions on Bitcoin in 2013, prohibiting banks from handling Bitcoin transactions but allowing individuals to hold and trade. ICOs — Initial Coin Offerings — were banned in September 2017. Crypto exchange operations were prohibited in China from the same period, with major exchanges including Huobi and OKEx moving their registered operations offshore while continuing to serve Chinese customers through VPN access.

The September 2021 circular issued jointly by the PBOC and nine other government bodies was the terminal document. It declared all cryptocurrency transactions illegal, including overseas exchanges serving Chinese residents, and explicitly criminalised facilitation of crypto trading. It imposed criminal liability on mining and on individuals providing services related to crypto transactions. It was comprehensive in a way that previous restrictions were not.

The practical effect of the September 2021 ban was substantial. Crypto mining — China had been responsible for a majority of global Bitcoin mining before 2021 — collapsed domestically, with miners relocating equipment to Kazakhstan, the United States, and other jurisdictions. Chinese crypto trading volume moved further offshore. The Huobi exchange, founded by Chinese nationals and long oriented toward Chinese users, went through complex ownership changes and restructuring. OKX similarly repositioned.

The Rationale: Why China Banned Crypto

The Chinese government has stated multiple rationales for the ban, and each is genuine rather than pretextual.

Capital controls: China maintains tight foreign exchange controls — individuals are limited to $50,000 in annual overseas remittances. Cryptocurrency allowed circumvention of these controls at scale, enabling capital outflow that the government had no visibility into or control over. From a monetary sovereignty perspective, a growing crypto market was a direct threat to the capital account management regime.

Monetary sovereignty: An asset that could function as a medium of exchange, store of value, and unit of account — as Bitcoin was beginning to in parts of the Chinese economy — represented a challenge to the renminbi’s monopoly on monetary functions within China. The government’s model requires monetary control; a parallel monetary system, however informal, was intolerable.

Financial stability: Chinese regulators pointed to the volatility, leverage, and speculative character of crypto markets as systemic risks. The PBOC’s financial stability reports characterised crypto as creating risks for retail investors and, at sufficient scale, for financial stability.

Energy: Bitcoin mining’s electricity consumption in China was raising environmental concerns at a time when China was making significant commitments to carbon emissions reduction.

Anti-money laundering: The anonymous and cross-border character of crypto transactions raised AML concerns that were manageable at small scale but increasingly significant as volumes grew.

The e-CNY: Design and Deployment

While China was progressively tightening the crypto ban, the PBOC was simultaneously developing the world’s most advanced CBDC. The e-CNY — officially the Digital Currency Electronic Payment system, widely called the Digital Yuan — has been in development since approximately 2014 and moved into large-scale public pilots from 2020.

The e-CNY is not a blockchain-based cryptocurrency. It is a centralised digital currency issued by the PBOC, distributed through a two-tier system: the PBOC issues e-CNY to licensed financial institutions, which distribute to retail users through digital wallets. Retail e-CNY wallets are offered by major Chinese commercial banks (ICBC, ABC, CCB, BOC) and payment platforms.

By 2024, the PBOC reported over 260 million individual wallets and transaction volumes measured in trillions of yuan. The e-CNY has been piloted in 26 cities and regions, used for government employee salary payments, consumer retail transactions, and government transfer programmes.

The e-CNY’s technical design incorporates programmability features — the ability to encode conditions on spending, such as geographical restrictions (money can only be spent within a specific city) or time-limited vouchers — that no existing commercial payment system supports. Government consumption vouchers during and after the COVID period were distributed as programmed e-CNY, automatically expiring if unused, and usable only with participating merchants.

The design is also surveillance-capable. The PBOC has stated publicly that e-CNY is “controllable anonymity” — anonymous between users at the wallet level, but accessible to law enforcement with appropriate authorisation. This is explicitly different from cash, which is fully anonymous, and from existing electronic payments, which are visible to commercial platforms but not automatically to government. The e-CNY positions the central bank in the transaction data chain.

The Hong Kong Exception

China’s total crypto ban coexists, paradoxically, with Hong Kong’s position as an explicitly government-backed crypto hub. Following the restoration of order in Hong Kong after 2019, Beijing has allowed — and indeed encouraged — Hong Kong to develop as a compliant crypto financial centre. The Hong Kong Securities and Futures Commission implemented a comprehensive crypto exchange licensing regime from 2023. Major exchanges operate licensed entities in Hong Kong. Hong Kong has approved spot Bitcoin and Ethereum ETFs.

The exception is coherent from Beijing’s perspective. Hong Kong’s crypto market is:

• Regulated: operating under SFC supervision with mandatory AML/CFT, investor protection, and custody requirements. This is not uncontrolled crypto — it is institutionalised, visible crypto.
• Separate: Hong Kong’s financial system, under “one country, two systems,” is legally distinct from the mainland. Capital controls apply at the border. Hong Kong’s crypto market does not directly enable mainland capital outflow in the way that uncontrolled crypto access from within China would.
• Strategic: demonstrating that China-adjacent jurisdictions can manage compliant crypto markets signals regulatory capacity, attracts international financial firms, and gives Hong Kong a FinTech competitive position that serves Beijing’s interest in maintaining Hong Kong as an international financial centre.

Belt and Road and Geopolitical Dimensions

The e-CNY has implications beyond China’s domestic monetary system. China has explored e-CNY use in cross-border trade with Belt and Road partner countries, positioning digital yuan settlement as an alternative to dollar-denominated transactions. Project mBridge — the BIS Innovation Hub project exploring multi-CBDC cross-border settlement — involved China’s PBOC alongside the UAE, Hong Kong, and Thailand central banks.

The US government and Western policymakers have specifically highlighted e-CNY as a potential mechanism for sanctions evasion — enabling trade flows with sanctioned entities denominated in digital yuan rather than dollars, outside the SWIFT system and therefore not subject to US secondary sanctions leverage. This concern has been expressed in US Treasury reports and congressional testimony.

The geopolitical dimension of China’s CBDC is real, though its near-term sanctions-evasion implications should not be overstated. The e-CNY’s current deployment is overwhelmingly domestic. Its cross-border capability exists but requires correspondent relationships with accepting jurisdictions’ central banks — not a frictionless alternative to the dollar system. The long-term trajectory, however, is an important element of why Western central banks have accelerated their own CBDC research programmes.

China’s digital asset policy is the most internally consistent in the world: ban the private version, build the state version, deploy it at scale, and begin exploring its international implications. Every element follows from the same underlying principle of monetary sovereignty in a digital age.