During a two-month period, Zhangfei contributed targeted engineering improvements to open source projects using TypeScript and algorithm optimization. In the element-plus repository, Zhangfei streamlined package management by removing Volta-specific configuration from package.json, clarifying SemVer support and reducing maintenance complexity for contributors. The following month, Zhangfei enhanced the vuejs/core tokenizer by implementing a binary search algorithm for line and column lookup, which reduced tokenization latency and improved performance for large codebases. These contributions focused on maintainability and efficiency, demonstrating depth in performance tuning and package management while addressing real-world developer workflow challenges in widely used JavaScript projects.