slow and quick

As early as [-], the Education Bureau issued a notice saying that primary and secondary school students across the country should go to group dances every day during recess and extracurricular activities.

Ji Lin and the others did not perform in primary school, they still did radio gymnastics.

Then I was promoted to junior high school, and it was inevitable to start learning group dance.

Group dances are in groups of four, and there are also groups of two.