The pinyin for "black" is: hē i.

The combination of "black":

1. Night: refers to the night without moonlight.

2. Black and white: refers to black and white; Metaphors are good and evil, right and wrong, good and evil, clear and turbid.

3. Black car: refers to a vehicle that has not gone through any relevant formalities in the transportation management department and has not obtained an operation license, and is illegally operated by paid service.

4. Night: Night, night.

5. Black pressure: describes many people or things together.

6. The moon is dark and the wind is high: later it was compared to a sinister environment.

7. Black and white: Black is written on white paper. Metaphor has conclusive written evidence, which cannot be denied or denied.

Black (pinyin: hēi) is a first-class standard Chinese character (commonly used word). This word first appeared in Oracle Bone Inscriptions and inscriptions on bronze in Shang Dynasty. The basic meaning of "black" is the color smoked by fire, that is, black, which is extended to darkness, that is, darkness. From darkness to secrecy, from secrecy to evil, evil and reactionary.

Of course, it is not a good thing to be wrong, and the meanings of "bad" and "vicious" in black letters are derived from this. The third fold of Yuan Anonymous's "Holding a Makeup Box": "A black heart." Ignoring moral laws and using various despicable means to harm others and benefit themselves is the evil result of "black heart" and has become a chronic disease of human society.

Doing bad things is not aboveboard, most of them are hidden, and black is extended to concealment and illegality. Such as: black market, black hands, black households, black goods, mafia, gangs, slang, black guns, black money, underworld, black holes, and so on.