During January 2026, Zhao worked on the apache/seatunnel repository, focusing on improving the accuracy of metrics in multi-sink pipeline scenarios. He addressed a bug where write count metrics were incorrectly displayed by introducing null checks across source readers and sink writers, ensuring that source read, sink write, and sink committed counts were calculated and reported correctly. Zhao updated both unit and integration tests in Java to reflect the revised logic and expected values, enhancing the reliability of monitoring and KPI dashboards. His work demonstrated careful attention to backend development and robust unit testing within the metrics subsystem of the project.