Dear valued nodes and developers: V1.6.5.1 has been released, and this upgrade mainly includes: - New feature added: Gas Back. More details on: - New feature added: EVM Tx to trigger staking and Gas Back Tx. More details on: - Bugs fix and performance optimization. Reference link: https://github.com/okex/exchain/releases/tag/v1.6.5.1 All node users please make sure that this upgrade shall be complete before2022-11-11 06:00 , or a node crash will happen. OKC November 7, 2022 .