元界（ETP）Metaverse ETP白皮书下载：
ETP_Metaverse-digital-identity-white-paper-v1.0-EN.pdf，ETP_Metaverse-whitepaper-v3.0-EN.pdf
元界（ETP）Metaverse ETP白皮书下载：ETP_Metaverse-digital-identity-white-paper-v1.0-EN.pdf，ETP_Metaverse-whitepaper-v3.0-EN.pdf
