Junbing Li enhanced the NclRSE-Training/countries repository by expanding the China entry with detailed population and capital data, focusing on improving data completeness for downstream analytics. Using data entry skills and working with structured text formats, Junbing ensured the new information was accurate and well-integrated, supporting more reliable demographic dashboards and reporting. The update was delivered as a single, traceable commit, facilitating future audits and rollbacks. While no bugs were addressed during this period, the work demonstrated careful attention to data quality and structure. The scope was limited to one feature, reflecting a targeted but thorough approach to dataset enrichment.