You should orientate yourself for the selection of FW, mainly according to the depiction of the given type of heart sensor, in the photos in the article. But it seems to be Hardware with Code Name: Wuhan. So here should be the FW for you: Firmware 2.4.0.32 | Mi Band 3 (Mili_wuhan) | GeekDoing
Use FW firmware at your own risk. We are not responsible for bricked devices.