According to the South China Morning Post, Sun Shengbin from the Wenzhou Public Security Bureau and Lou Yandi from the Criminal Investigation Division of the Zhejiang Provincial Public Security Department published a paper on June 4 in the journal *Criminal Technology*, detailing the procedures for evidence collection, tracing, seizure, and freezing in cryptocurrency-related cases. Investigators can identify assets by scanning private keys, mnemonic phrases, screenshots, and chat records stored on mobile phones, computers, and hardware wallets. If private keys are not obtained, they can trace assets using blockchain transaction records, cross-chain transfer paths, coin-mixing fund flows, and real-name information from exchanges. For assets involved in cases, police can transfer them to controlled wallets by changing private keys or coordinate with exchanges to freeze accounts. The report emphasizes that private key management must be separated from case handling and that complete regulatory records must be maintained.
