During December 2025, Wei Yang contributed to the apache/shardingsphere repository by developing a configuration property that controls the maximum number of UNION ALL operations per datasource. This feature, implemented in Java with a focus on configuration management and unit testing, enables more efficient batching of queries and reduces the risk of performance degradation in distributed query execution. By introducing the max-union-size-per-datasource setting, Wei Yang enhanced the system’s ability to manage query execution scope, providing users with greater control over multi-datasource operations. The work demonstrated a thoughtful approach to performance tuning and stable delivery within a large-scale data infrastructure project.