Under what circumstances should the parking distance be 30 meters or 50 meters?

[VonJuniper]

The Road Traffic Safety Law, Article 63 stipulates that when a motor vehicle is temporarily parked on the road, the following regulations must be observed: No parking zones: sections of the road with no-parking signs or markings, sections with isolation facilities between motor vehicle lanes and non-motor vehicle lanes or sidewalks, as well as crosswalks and construction areas; 50-meter no-parking zones: intersections, railway crossings, sharp curves, narrow roads less than 4 meters wide, bridges, steep slopes, and tunnels; 30-meter no-parking zones: in front of bus stops, emergency stations, gas stations, fire hydrants, or fire stations; doors must not be opened and passengers must not board or alight before the vehicle comes to a complete stop, and opening or closing doors must not obstruct the passage of other vehicles or pedestrians; roadside parking must be close to the right side of the road, and the driver must not leave the vehicle, and must depart immediately after passengers board or alight or after loading or unloading goods; urban buses must not stop to pick up or drop off passengers outside designated bus stops.