ChainCatcher news, Aptos node v1.16.3 has been updated, users need to upgrade to the latest version within the next 5 days. This update aims to improve system stability and security and ensure smooth network operation. Including adding a procedural macro bytecode_spec so that the inline specification of Move bytecode instructions can be defined in Rust; adding a runtime environment outside the VM. This environment can be used for caching and may be shared between VM instances.