Idiom that describes knowing a person very well.

See through autumn, see through fire, see the crux of the problem, and know it like the palm of your hand.

First, see through autumn [míng cháqi Hao]

Interpretation: insight: see clearly; Qiu Hao: New fine hairs on birds and animals in autumn. The original shape makes people have keen eyes, and any small thing can be seen clearly. The latter describes people's insight into things.

From: "Mencius Hui Liang Wang Shang" Mencius during the Warring States Period: "Ming is enough to watch the end of autumn, but not to see his salary, then what is Wang Xu?"

Wang promised him when he could see clearly, but he couldn't see a car full of firewood.

Second, if you watch the fire in the cave.

Explanation: hole: thorough. It is very clear to observe things, just like watching fire.

From: Pre-Qin philosophers in Zhou Dynasty, Shangshu Pan Geng: "If you watch the fire."

Observing things clearly is like watching fire.

Third, insight into the crux of the problem.

Interpretation: epiphany: see clearly; Crux: The disease of caking in the stomach is the key to the problem. Metaphor is the key to entanglement or problem. Describe keen observation and see the key to the problem.

Sima Qian's Biographies of Historical Records, Bian Que and Cang Gong in the Western Han Dynasty: "Bian Que took medicine for 30 days, depending on his prescription. Relying on this, we can see the crux of the five internal organs, especially in the name of pulse diagnosis. "

Bian Que took the medicine as he said for 30 days and met the man on the other side of the wall. Therefore, when you visit patients, you can see the five internal organs, especially in the name of pulse diagnosis.

Fourth, just like the back of my hand [Li m: o ǐ zh ǐ zh m: ng]

Explanation: Yes: I understand; Finger palm: Point to the palm of your hand. Describe a person who knows things clearly and likes to put things in his hand for others to see.

From: The Analects of Confucius Eight-part Essay in the Warring States Period: "The Theory of Or Asking". Confucius said:' I don't know; Knowing that what he said is also said to the world, just like showing it! "Like the palm of his hand. "Make peace and set a solution.

Someone asked persimmon. Confucius said: "I don't know; Do you know what he said? He is in the world, as shown in the picture! Your palm. Yanhe Ji Jie

V. Loud and clear [Y and Q and ng è r ch ǔ]

Explanation: Very clear.

From: Lao She's Four Generations under One roof: "Xiao Shuner should tell everything clearly, otherwise how can he be a good mother's bodyguard?"