币界网报道：According to official news from Bijie.com on June 18, the Signet Ring modular identity credential launched by the public chain project IOST was officially launched at 22:00 GMT+8 on June 18. The limited edition of 1,000 pieces was sold out within half an hour, becoming one of the hottest new products in the on-chain identity assets recently. Signet Ring integrates NFT authentication, wearable hardware and biometric functions, and will support veIOST reward collection, friend recommendation rebate and ecological priority permissions. According to IOST official data, the current user estimated annualized return is 3 times, supporting daily collection and multiple unlocking options. The project party said that this product marks a key progress in the implementation of IOST 3.0 in the on-chain identity structured module.