During their work on the arceos-hypervisor/axvisor repository, this developer implemented virtualized timer management within the VM monitor, focusing on embedded systems and system programming using Rust. They designed and integrated a timer list and refactored timer initialization into the hardware abstraction layer, enabling modular maintenance and future extensibility. Their approach established dependencies to support timer event registration, cancellation, and checks, laying the foundation for deterministic guest timers and improved VM scheduling. Although no major bugs were fixed during this period, the depth of their contribution provided essential infrastructure for virtualization, aligning the timer subsystem with HAL boundaries for robust system operation.