What are the idioms with the most words?

The idiom with the largest number of words is 16:

A wise man will make a mistake in every thought, and a fool will make a gain in every thought

Either the east wind overwhelms the west wind, or The west wind overwhelms the east wind

Five-character idiom: A small witch sees a big witch, and he will never come back

Six-character idiom: Wind, horse, and cow are irrelevant, and nothing will stop if you don't do it

Seven-character idiom: A hero is saddened by beauty, every inch of time is worth an inch of gold

Eight-character idiom: A miss can make a difference of a thousand miles, an opportunity must not be missed and it will never come again

Nine-character idiom: cleverness A woman cannot make a meal without rice, and three feet of ice cannot be frozen in a day

Cross idiom: Use the heart of a villain to measure the belly of a gentleman, everything in the world is difficult only for those who are willing

11-character idiom: Treat the person in his own way, see the root of the problem without noticing the consequences

12-character idiom: Only the state officials are allowed to set fires, but the people are not allowed to light lamps