What does 'sweeping the line' mean?

[IsabelFitz]

Sweeping the line is a foul term in the driving license subject two exam. Introduction to sweeping the line: It refers to the wheels pressing against the line or the vehicle body crossing the line. During the exam, the vehicle must not sweep the line at any time, let alone press against it. It's also important to note that during reverse parking, it's not just about the wheels not pressing the line; the vehicle body must not cross the line either, as crossing the line results in failure. Subject two evaluation criteria: During the subject two exam, not following the prescribed route or sequence results in failure. The vehicle body pressing the line or failing to complete reverse parking results in failure. Taking more than 210 seconds to complete reverse parking results in failure. Stopping midway deducts 5 points each time.