Developed virtualized timer management for the arceos-hypervisor/axvisor repository, focusing on enabling deterministic guest timers and improving virtual machine scheduling. The work involved implementing a timer list and refactoring timer initialization into the hardware abstraction layer, ensuring modularity and future extensibility. By supporting timer event registration, cancellation, and checks within the VM monitor, the solution established a robust foundation for timer virtualization. Leveraging expertise in Rust, embedded systems, and system programming, the developer aligned the timer subsystem with HAL boundaries to facilitate maintainable code and future enhancements. No major bugs were addressed during this period, with efforts concentrated on new feature development.