What does the number 4 mean in China? Is it auspicious or inauspicious?

Because the number 4 in China is pronounced in harmony with the Chinese character "死", it is unlucky.

In our folklore, many people are due to "4" and "death" pronunciation is similar, so in people's lives, the choice of goods or other products, "4" taboo. So in people's life, when choosing goods or other products, there are some taboos against "4". (For example: floor with 4, cell phone number with 4, license plate with 4, etc., in the face of people's choices, are not very favorite).

Expanded Information:

Mixed:

When simple letters and numbers are not enough to express the emotions of the netizens, they will be mixed with words, English words and so on. When simple letters and numbers are not enough to express netizens' emotions, mixing them with words, English words, etc. becomes a kind of non-mainstream expression on the Internet, e.g.: Happiness-ing (a combination of a Chinese word and an English verb suffix to indicate that the process of enjoying happiness is underway).

3q (a combination of a number and an English letter, thank you), me2 (metoo, a combination of an English word and a number, me too), + U (a combination of an arithmetic symbol and an English letter, cheering up), this kind of network terminology mixed with many kinds of characters undoubtedly does not conform to the norms of any kind of language, and even has no rules to follow.

But it is a form of expression based on simplicity and the aim of "making sense, making sense", which allows netizens to give free play to their ideas without having to stick to the shackles of traditional language and grammar.