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.