This example demonstrates a simple line chart of weekly data using the ECharts library. It renders a smooth curve across seven days of the week with values ranging from 820 to 1330. The visualization is initialized on a fixed-size DOM element via the `echarts.init` method, and the chart configuration specifies a category x-axis and a value y-axis. The code loads ECharts from a CDN and uses the `setOption` API to define the line series, showing how the library handles standard chart rendering with minimal setup.