a light incident part having a high-beam incident part and an auxiliary lighting structure;

a light guide part; and

a light emitting part with a light emitting surface,

wherein the light incident part, the light guide part and the light emitting part are sequentially arranged from back to front, the light emitted from the light incident part enters from the high-beam incident part, and is sequentially transmitted to the light guide part and the light emitting part, finally, it is emitted by the light emitting surface to form high-beam illumination light, and the auxiliary lighting structure comprising:

an auxiliary lighting incident surface;

a first reflecting surface; and

a second reflecting surface;

a rear end surface of the auxiliary lighting structure is formed as the auxiliary lighting incident surface; the first reflecting surface is configured to reflect light received by the auxiliary lighting incident surface to the second reflecting surface; and the second reflecting surface is configured to reflect light reflected from the first reflecting surface to the light guide part; the auxiliary lighting structure is located below the high-beam incident part, and the first reflecting surface is located below the second reflecting surface; the auxiliary lighting incident surface comprises a vertical light incident surface and an oblique light incident surface, and the oblique light incident surface is arranged to extend obliquely forward and downward from a bottom end of the vertical light incident surface;

in order that the auxiliary lighting structure configured to transmit incident light to the light guide part after at least one reflection, to then be projected into a low-beam III pattern by the light emitting surface.