How many times should the high and low beams be alternated in Subject 3 lighting test?

[SanPeter]

No less than twice. More information about alternating high and low beams in Subject 3 lighting test is as follows: Overview: During the lighting test, when you hear voice prompts such as 'approaching a sharp curve', 'approaching a slope', 'approaching a humpback bridge', 'approaching a crosswalk', or 'approaching an intersection without traffic lights', you should alternate between high and low beams no less than twice. Others: When you hear 'preparing to overtake, please use correct lights', first turn on the left turn signal, then alternate between high and low beams no less than twice, and then turn on the right turn signal. After completing the lighting simulation, the candidate must turn off the lights before proceeding to the next test item.