A article published by the technical staff of the Zhejiang Provincial Public Security Department's Criminal Investigation Corps and the Wenzhou City Public Security Bureau in the journal *Criminal Technology* discloses some of the technical procedures used by Chinese law enforcement in handling cryptocurrency-related cases.

1. Chinese police methods for handling cryptocurrency:
Locate the person → Retrieve offline device evidence → Extract private keys/seed phrases/wallet information → On-chain fund tracing → Cross-chain analysis → Exchange KYC correlation → Asset freezing/transfer → Judicial disposal.
Core methods: Method 1: Freeze at the exchange. Method 2: Control the private key.

2. Mixers and cross-chain bridges are no longer safe zones:
Original laundering methods: BTC → ETH → Arbitrum → USDT → Mixer → DEX → Exchange
Many times can still be reconstructed: On-chain clustering analysis, address profiling, temporal correlation analysis, cross-chain fund mapping, mixer entry/exit analysis, CEX KYC correlation.

3. Regarding how the police safeguard seized assets:
Seized BTC → Transfer to police-specific wallet → Set up 2/3 or 3/5 multi-signature → Investigators, finance personnel, and regulatory authorities each hold a key.

So, you think that being anonymous makes you untraceable. In reality, over 90% of breakthroughs come from off-chain sources. The strategy isn't to find the coins, but to find the person controlling the coins. The core of law enforcement is not breaking the blockchain, but establishing the mapping relationship between "on-chain addresses and real-world identities."

The truly leaked information is: In the past decade, the crypto world focused on how to hide assets; in the next decade, the crypto world will focus on how to prove who owns the assets.