DEEBOT cannot find the charging dock

Place DEEBOT about 1 meter directly in front of the charging dock, press and hold the AUTO button for 3 seconds to hear the "Returning to the Charging Dock" voice prompt, or open the App and tap on Return mode to check whether the robot can return to charge. If it can return to charge normally, please:
1. Check whether all the protective film on the charging dock has been removed.
2. Check whether DEEBOT starts cleaning from the charging dock.
3. Check whether the charging dock is positioned according to the guidelines in the Instruction Manual.
4. Move the charging dock to another position and try again.