What is the correct way to use high and low beam alternation?

[LukasFitz]

The alternation between high and low beams should be performed no less than twice. When hearing voice prompts such as: approaching a sharp curve, approaching a slope, approaching a humpback bridge, approaching a crosswalk, or approaching an intersection without traffic signal control, you should alternate between high and low beams. Below are the relevant details: 1. Situations requiring high and low beam alternation: During the lighting test, when you hear voice prompts like approaching a sharp curve, approaching a slope, approaching a humpback bridge, approaching a crosswalk, or approaching an intersection without traffic signal control, you should alternate between high and low beams no less than twice. 2. Special circumstances: When you hear the prompt to overtake and are instructed to use the correct lighting, first turn on the left turn signal, then alternate between high and low beams no less than twice, and finally turn on the right turn signal.