During November 2025, this developer enhanced the apache/doris repository by implementing a new SQL factorial function in C++ that supports edge-case handling and maintains compatibility with Hive, expanding the system’s analytical capabilities. They also contributed to the apache/doris-website repository by producing comprehensive, user-facing documentation for the factorial function, including syntax, parameters, and return values, with bilingual support in Chinese and English and versioned 4.x documentation. Their work demonstrated skills in C++ development, SQL function integration, and technical writing, focusing on improving developer onboarding and reducing the need for workarounds in mathematical query operations. No major bugs were addressed.