Worked on stabilizing cancelable request handling for the rjg-lyh/vllm-ascend repository, focusing on backend reliability and throughput. Addressed a core issue where canceled requests previously caused the waiting queue to accumulate and stall processing. The solution involved replacing sequential request ID generation with UUIDs and implementing graceful handling for client disconnections, ensuring that stalled requests no longer blocked the system. Leveraged Python for backend development, emphasizing asynchronous programming and robust error handling. This work improved system stability under high-cancellation scenarios, reduced backlog, and enhanced overall request lifecycle management, as tracked in commit ee6d141 and pull request #2426.