1. Appointment setting error: You made an error in setting the appointment, and the appointment time was set to 9 pm instead of 2 pm. Please check the settings carefully at the next appointment.

2. Improper operation of the robot: other people improperly operate the robot, resulting in changes in the working hours of the robot. Please make sure that only you or someone you trust can operate the robot.

3. System failure: The robot system failed, resulting in the wrong appointment time. You can try to restart the robot or contact Cobos customer service for help.