Qing He contributed to the apache/dolphinscheduler project by addressing a reliability issue related to MySQL datasource scheduling. During October 2025, Qing updated the project documentation to include a detailed notice on MySQL timezone configuration, clarifying how ambiguous timezone identifiers can cause scheduling errors in cross-region deployments. This work involved analyzing the interaction between MySQL settings and the scheduler’s runtime behavior, then translating those findings into clear Markdown documentation. By making timezone guidance explicit, Qing reduced the risk of runtime incidents and support overhead. The work demonstrated a focused application of MySQL, database configuration, and technical documentation skills within a short timeframe.