What does 'fixed point less than fifty' mean?

[DePaislee]

In the subject two fixed-point parking, if the distance from the edge line is less than fifty centimeters but more than thirty centimeters, 10 points will be deducted. Subject Two: Subject Two, also known as the small road test, is part of the motor vehicle driver's license assessment. It is the abbreviation for the field driving skill test subject and is a test item for small cars C1 and C2, including five compulsory tests: reversing into a garage, parallel parking, fixed-point parking and starting on a slope, turning at a right angle, and curve driving. Starting on a Slope: Starting on a slope refers to starting a car on a slope with a certain angle. It is a basic skill that new drivers must possess and a compulsory content of Subject Two.