the low beam lamp has both upper and lower folding angles. The function of the upper corner of the low beam lamp is to prevent the light from shaking to the opposite car when passing. The upper corner lamp divides the upper part and the lower part of the lamp group. The upper part is mainly the daytime running light area, and the lower part is the lighting area. The function of the lower corner of the low beam is to increase the irradiation distance and improve the safety of driving at night. There is no division of lamp groups, so there are both upper and lower corners of the low beam.