How to set up night vision related functions for Xiaomi Smart Camera C500 Pro?

Go to [Mi Home] APP >> select the device >> tap [...] at the upper right corner >> [Camera Settings] >> [Night vision] Settings >> you can turn on/off [Full-color with low-light] and [Night vision] Auto switch/ Always on/ Always off.
If the [Night vision] selection is always on, the [Full-color with low-light] feature will not take effect and the screen will remain in black and white or black. It is recommended to simply select Auto Switch.