1. Use an angle below the knee: put the camera or mobile phone at an appropriate height and aim it below the knee. Tripods, brackets or other supports can be used to stabilize the equipment.

2. Use obstacles: When shooting, you can use obstacles (such as towels and obstacles). ) Cover your camera or mobile phone above your waist to ensure that your face will not be exposed.

3. Foot patting or action: In addition to only patting below the knee, you can also focus on foot patting or specific actions. This can highlight the picture below the knee without showing your face.