Yuhang Zhang focused on backend reliability and configuration management during this period, addressing critical issues in both the apache/flink and langgenius/dify-plugin-daemon repositories. In apache/flink, Yuhang enhanced Kubernetes logging integration by implementing logic in Java to dynamically mount a comprehensive set of Logback and Log4j configuration files, improving deployment stability and observability. For langgenius/dify-plugin-daemon, Yuhang resolved Redis CROSSSLOT routing errors by adjusting connection key prefixes in Go, ensuring correct command routing in clustered environments. These targeted bug fixes demonstrated depth in Kubernetes, Java, Go, and Redis, resulting in more robust, maintainable, and reliable distributed system deployments.