At what distance from an oncoming vehicle should you switch to low beams during nighttime driving?

[FelicityLee]

You should switch to low beams when approximately 150 meters away from the oncoming vehicle and coordinate with the opposite vehicle for low beam usage. Below is additional information: Usage of vehicle lights during nighttime driving: When meeting vehicles on roads without central separation facilities or center lines, do not use high beams within 150 meters of the oncoming vehicle; when meeting non-motor vehicles on narrow bridges or narrow roads without central separation facilities or center lines, do not use high beams; when driving at night on roads without streetlights, under poor lighting conditions, or in low visibility situations such as fog, rain, snow, or dust, do not use high beams when following closely behind another vehicle traveling in the same direction; when passing sharp curves, slopes, arched bridges, crosswalks, or intersections without traffic signals, alternate between high and low beams as a signal.