What is the idiom to describe people who know nothing but laugh at them?

The idiom to describe people who know nothing but laugh at them is:

1, self-deception

Pinyin: z? q ? r é n

Explanation: Self-deception.

Source: Zhuzi School: "It is said that deceiving others is self-deception, and this is also self-deception."

Some people say that China's industry will be upgraded as a result, which is self-deception.

2. Yelang is arrogant

Pinyin: yéláng ZDà

Explanation: Yelang: a small country in the southwest of Han Dynasty. Metaphor is ignorance and arrogance.

Source: Historical Records Biography of Southwest Yi: "The king of Yunnan, the messenger of the Han Dynasty said,' Who is the greatest in the Han Dynasty?' The same is true of Yelanghou. Road impassability, each thinks he is the owner of the state, I don't know the vast number of Han people. "

For example, make a sentence: shooting a car is crazy, so you are arrogant. Relying on the spirit of corruption, Hebo is revered.

Step 3 be conceited

Pinyin: ZGāo ZDà

Explanation: I think I'm great.

Source: Yan Zhitui's "Yan Family Instructions Mianxue" in the Northern Qi Dynasty: "People who read ten books are tall and arrogant, and they don't look at their elders and despise them."

For example, if people are arrogant and look down on others, it is impossible to make progress.