According to online reports, according to the public account of the Supreme People's Procuratorate, the Haidian District Procuratorate of Beijing City issued the "White Paper on Anti-Commercial Corruption Prosecutions (2020-2024)", which disclosed that an employee of a large factory defrauded a Short Video platform company's reward money, involving a total amount of more than 140 million yuan. The employee thought of Bitcoin and used 8 overseas virtual currency trading platforms to convert the money involved in the case from RMB into virtual currency, and then confused the source and type of virtual currency through overseas" mixed currency "platforms, and transferred it through multiple levels in the form of virtual currency. Criminals use virtual currency as a medium to deliberately increase the complexity of transactions to avoid the traceability of funds. The procuratorate launched a technology-assisted review mechanism, using blockchain big data flow analysis tools and "two-way review" of the flow of virtual currency and RMB to prove the transfer path of the money and virtual currency involved in the case, laying the foundation for further clarifying the facts and recovering stolen assets and losses.