First, click the link
https://gt.shiantech.com/index.html, then you will see a CO2 chart interface. When the interface is first opened, it will display the demo data. On the right side of the menu bar, you can read the instructions
and set your language. In the switching area on the left, you can switch between different items. The graph area includes numerical trend graph, maximum and minimum values with corresponding time, four function icons and zoom axis.