This interactive dashboard visualizes the market capitalization of top Chinese companies using a bar chart built with React and D3.js v7. The visualization uses `d3.scaleBand` and `d3.scaleLinear` to map company names and values, with `d3.scaleOrdinal` for sector-based color coding. Users can hover over bars to see detailed tooltips, click bars to highlight companies, and filter by sector through an interactive legend. A summary panel displays market overview statistics, computed dynamically from the loaded CSV data.