Is it three or two times to alternate between high and low beams in Subject 3?

[LeGabriel]

In Subject 3, the high and low beams should be alternated three times. Here are the relevant details: 1. Situations requiring high and low beam alternation: During the lighting test, when you hear prompts such as 'approaching a sharp curve', 'approaching a slope', 'approaching a bridge', 'approaching a crosswalk', or 'approaching an intersection without traffic signals', you must alternate between high and low beams at least twice. 2. Special circumstances: When you hear 'prepare to overtake, please use the correct lights', first turn on the left turn signal, then alternate between high and low beams at least twice, followed by turning on the right turn signal.