4, GB 4599-1994
4.2 light matching requirements:
1) near light: sufficient lighting and no glare; far light: good
2) the front 25m of the headlamp reference center;
3) near light should produce obvious bright and dark cutoff lines, horizontal parts
On the left side of the V-V line, the right is 15 degrees upward with the horizontal line.
A slanting line, or perpendicular to a 45 degree oblique line to a horizontal line
A line with a 25cm turning level.