"The friendship between gentlemen is as light as water, and the friendship between villains is as sweet as sweet wine" is an idiom, which means that a true friendship should be as light and natural as fresh water, and should not be as fake and sweet as sweet wine.

The picture comes from the Internet

This sentence emphasizes the quality of making friends and the sincerity and depth between friends. For a gentleman, true friendship is based on mutual respect and trust, and the relationship is as natural and clear as water; while for a villain, making friends is often based on personal interests, and the relationship is as false and sweet as sweet wine. .

The picture comes from the Internet

Therefore, this idiom is to warn people to choose friends carefully and establish deep friendship with those who are truly trustworthy.