Paired couplets: eat small fish the big fish, shrimp the small fish, and shrimp the water.

The first part: The big fish eat small fish, the small fish eat shrimp, shrimp draft, get to the bottom of it.

Downward: the stream belongs to the river, the river belongs to the river, the river belongs to the sea, and the sea is vast.

Bottom line: tigers eat foxes, foxes eat rabbits, rabbits eat grass, and grass hides stones.

Extended data:

Couplets are classified according to their sources:

1, sentence-set couplet: a couplet composed entirely of ready-made sentences in ancient poetry.

2. Ci couplets: couplets composed of ancient Copybook for calligraphy articles and characters.

3. Sentence-picking couplets: Couplets made by picking antithetical sentences directly from other people's poems.

4. Create couplets: couplets independently created by the author.