HashKey Group launched its Ethereum layer-2 mainnet, HashKey Chain, on December 18, following a successful testnet that registered over 860,000 wallets and recorded 24.72 million transactions. The mainnet achieved 400 transactions per second and low gas fees, enhancing the user experience for decentralized applications. This launch coincides with Hong Kong's regulatory advancements in cryptocurrency, including a proposed stablecoin bill and the approval of four new virtual asset trading platforms.