Worked on the infiniflow/ragflow repository to address a critical integration issue with Aliyun OSS, focusing on backend stability and data ingestion reliability. Using Python, YAML, and boto3, implemented a targeted bug fix that resolved PutObject errors by ensuring compatibility with Aliyun OSS S3 signature versions and adhering to the required addressing style. The solution involved updating the signature_version workflow to prevent aws-chunked encoding failures, aligning the implementation with Aliyun OSS documentation. Delivered the fix as a single, auditable commit, which improved maintainability and enabled straightforward rollback if necessary, demonstrating a methodical approach to backend development and cloud integration.