After listening to the introduction of the teacher on the first floor, the newcomers bowed their heads excitedly and started discussing amongst themselves.
The teacher surnamed Xu led everyone inside.
They first stopped in a shared space on the first floor.
The teaching building had a total of five floors, but there were no stairs.
There were three elevators on the left and right sides of the shared space on the first floor.
Teacher Xu stopped by the elevator and explained to them, "Each student will have his own card. The elevator has a card-swiping system. Students in higher grades can enter the lower floors, but lower grades can only stay on the lower floors."
That was to say, the students in the third grade could only stay on the first floor, but the fourth and fifth graders could enter at will.
Teacher Xu brought them inside.