[On-Chain Investigator: Numerous North Korean IT Workers Deeply Involved in Building Blockchain Protocols, Tracing Back to 2020 DeFi Summer] BlockBeats News, April 5: On-chain investigator Tay (@tayvano_) revealed that numerous North Korean IT workers have been deeply involved in building various blockchain protocols we know and love since the 2020 DeFi Summer. Therefore, when their resumes state '7 years of blockchain development experience,' it is not false—they indeed have hands-on experience. The crypto protocols involved include SushiSwap, THORChain, Harmony, Ankr, Shib, and Yearn, among others.