Lujie focused on backend development and code optimization in the apache/fluss repository, addressing robustness in Logical Scope construction. During the month, Lujie fixed a bug in the createLogicalScope method, ensuring that empty or null group names no longer resulted in unnecessary delimiter concatenation. This targeted change improved both the correctness and performance of scope calculation across modules, reducing edge-case failures and supporting future maintainability. Working primarily with Java, Lujie implemented empty-string checks to streamline logic and enhance reliability. The work demonstrated careful attention to minimal, high-impact changes, contributing to system stability and developer productivity without introducing new features.