People who practice martial arts should practice often, and singers should sing often. Metaphor means that only by studying hard and practicing hard can you master kung fu.
The origin of the idiom: LinYu's knife tip: "Never leave your fist, never leave your mouth."
Examples of idioms:
Example 1: Only by "never leaving the fist, never leaving the mouth" can you master Kung Fu.
Ex. 2: Only by "never leaving your fist and never leaving your mouth" can you turn the ability you have learned in the learning process into your own internal force.
This proverb was later compiled into ancient and modern sages (exhortation):
Mu Feng Chun is still alive, and people are no longer young. If you don't get old, you will accomplish nothing. I'm afraid children can't learn. The waves behind the Yangtze River push the waves before, and today's people in the world are better than the ancients. If you waste your time, you will leave regrets in the old space. Ambition is not high, but ambition is a hundred years old. A lazy youth, a lousy age. Study hard and make progress every day. Perseverance is tempered by time. 360 lines, each line is a champion. Ice is born in water, colder than water, and shines on you more than blue. When the book is used, I hate it less. It's not difficult. Let's talk about it later.
The body is afraid of not moving, and the brain is afraid of not using it. The more you use your hands, the smarter your brain becomes. Three days fishing, two days drying nets, half-hearted, nothing. Practice one day, work one day, and not practice for ten days one day. Fist never leaves, mouth never leaves. Knives will rust if they are not sharpened, and people will fall behind if they don't learn. There is a road in the mountain of books, but there is no limit to learning the sea. The master leads the door and practices on his own. Practice makes perfect, and diligence is good at it.