This visualization presents the 2018 funding distribution of China’s National Natural Science Foundation general projects, with views examining applicant age, academic degree, professional duty, and institution type. The age heatmap uses Vega-Lite’s `vl.markRect()` to render a grid of rectangles colored by applicant count, while the stacked bar charts are built with D3 v3’s `d3.layout.stack()` and `d3.legend.color()`, featuring hover tooltips via `d3-tip`. Data is loaded from CSV files, and SVG renders all elements interactively.