Teh Ming Han enhanced the MicrosoftDocs/query-docs repository by delivering targeted documentation improvements for DAX functions. Focusing on Markdown-based documentation, he clarified default behaviors and distinctions between DAX and MDX function listings, ensuring that INFO.FUNCTIONS documentation accurately reflects origin restrictions and default return values. In addition, he improved the DAX Datatable Function documentation by specifying the semantics of the ColumnName parameter, reducing ambiguity for developers. His disciplined approach leveraged version control to track and publish changes, resulting in clearer, more maintainable documentation. Through these updates, Teh Ming Han contributed to a more accurate and developer-friendly DAX documentation ecosystem.