My favorite classic novel is Water Margin.

Groundwater pollution has become a serious environmental problem.

I saw various aquatic creatures at the aquarium.

He cautioned not to speak ill of others, saying, 'Illness enters by the mouth, and disaster does not come out of it.'

I consume royal jelly every day.

He is always facing difficulties, just like the proverb 'clouds over the moon, wind in the flowers'.

He crossed many mountains and rivers to meet her.

Please remember this old proverb, 'The friendship of a gentleman is insipid as water.'

She is beautiful like a peony when she stands, a peony when she sits, and a lily when she walks.