This area chart depicts the population of China from 1950 to 2020, using a smooth, curved line to trace the trend over time and a filled orange area beneath it to emphasize the magnitude. The chart is rendered as an SVG using D3.js v5, with data loaded from a remote CSV file via `d3.csv`. Axes are generated with `d3.axisLeft` and `d3.axisBottom`, while the line and area paths are created using `d3.line` and `d3.area` with a basis curve for smoothing. Axis labels are styled via CSS.