This area chart compares export values for China and the USA over time, using semi-transparent light blue and light green filled regions to show the trends for each country. The visualization is built with D3.js v7 and renders to SVG, using `d3.area()` to generate the stacked-looking paths and `d3.scaleLinear()` for the axes. Data is loaded from a remote CSV file and parsed before being mapped to the x-axis (year) and y-axis (exports in billion USD).