1. Make sure that mi band 8 is successfully connected to the mobile phone.
2. Open the Xiaomi Sports Health APP and click the "Device" option. Locate and select "mi band 8" in the device list.
3. Find the "Health Monitoring" option in the relevant settings and click to enter the page.
4. On the health monitoring page, find and select the "blood pressure measurement" function. There will be a corresponding button or icon to click on.
Keep your arms flush with your heart and make sure they are close to your skin. Do not over-squeeze the sleeve and elastic band and other factors that affect the accuracy.