[Base Mainnet to Upgrade on October 8] The Base Mainnet will undergo the Optimism Superchain U16A upgrade from 1:00 to 3:00 Beijing Time on October 8. During the upgrade, pending withdrawals from the Base Mainnet to Ethereum L1 will be temporarily invalid, but deposits and on-chain activities will not be affected. Users need to complete withdrawals before the upgrade; incomplete withdrawals will need to be re-verified after the upgrade. This upgrade poses no risk to ETH or ERC-20 tokens.