Group 1 - OSL HK has received approval from the Hong Kong Securities and Futures Commission to offer Solana (SOL) trading services to retail investors, becoming the first exchange in Hong Kong to support SOL retail trading [1] - OSL has opened SOL deposit and withdrawal services on the Solana network, and FlashTrade is now available for SOL/USD and SOL/HKD trading pairs [1] - This marks the first addition of a new cryptocurrency for retail investors in Hong Kong this year, expanding beyond the previously available Bitcoin (BTC) and Ethereum (ETH) [1] Group 2 - Solana is an optimized Layer-1 blockchain designed for scalability, supporting a peak capacity of 65,000 transactions per second and a block time of 400 milliseconds [2] - Solana utilizes a timestamp system called "Proof of History" (PoH) to automatically order transactions for validators, serving as the network's consensus mechanism [2] - PoH is used to cryptographically verify the time elapsed between two events and is built on a Proof of Stake (PoS) consensus algorithm to enhance network security [2]