Compare the first grade of primary school to see who crosses the river first. Chinese is a word recognition competition, and mathematics is a verbal arithmetic competition.

Frog is a clever, lovely and pleasing animal. Frogs are amphibians, which lay eggs and live in groups. Frogs are beneficial insects, and they like to eat small fish and shrimps in the water and small insects on the land. Who goes to the other side of the river first depends on the size and physical condition of the two frogs.

Little frogs can't swim better than big frogs, and those who are in poor health can't swim better. Whoever is in good health and swims fast will swim to the other side of the river first.