There will be a particularly bright child in many classes, who can be the first in the class, even if it is some township middle schools with average overall strength, there is an absolute student in each class.
Interestingly, most of the classes of such children will produce only one, and it is rare for two or even three to compete for the first place for a long time, but from two to five or six will form a second group, which is close to each other's strength and cannot catch up with the first place, but has a clear advantage compared with other students.
The first place in this class is not immutable, or it has been riding the dust, if it is chased by others, it may be an accidental situation, and it can be surpassed again, but once it is suppressed by a fixed opponent two or three times in a row, often the latter becomes the new first in the class, and it is difficult to complete the overtaking again by the original first who is surpassed.
Once the original top of the list is stabilized, or the challenger stabilizes the results, there will still be a situation where the first place is far ahead, and the second place is contested.
If there are ten classes in a grade, the students at the top are often only in single digits, and they will be evenly distributed in each class, so that there will only be one top student in a class.
After the second place, there is the existence of the second grade, and the number of students in the second grade is no longer in the single digits, so there will be more than one student competing for the strength of the second grade.
In contrast, the first grade is often not a fixed student, and the first class takes turns to attack. There is more than one top student competing for the first place in the grade.