According to the official news, Metis announced the intention to carry out a hard fork at block height 18118000. This hard fork will enable EIP-3855, introduce the PUSH0 (0x5f) instruction, and push the constant value 0 to the stack and add the placeholder parameter of the L1 fee to the L2 transaction for use in future calculations, with the aim of ensuring the continued stability and functionality of the network.