According to Article 18 of the Law of People's Republic of China (PRC) on Common Language and Characters, "Chinese Pinyin Scheme is a unified spelling standard for Chinese names, place names and Roman letters in Chinese documents, and it is used in places where Chinese characters are inconvenient or unusable." The symbols written according to this set of specifications are called Pinyin.

Chinese Pinyin is also an internationally recognized Latin phonetic standard for modern Chinese.

The international standard ISO7098 (Chinese Roman alphabet spelling) stipulates: "Use the Chinese Pinyin Scheme officially adopted by China People's Congress (1958 February 1 1) to spell Chinese, and the author records the pronunciation according to the pronunciation of Mandarin Chinese characters.

Extended data:

The Basic Rules of Chinese Pinyin Orthography stipulates the rules of modern Chinese Pinyin. The content includes word segmentation, idiom spelling, foreign word spelling, intonation, transfer law and so on.

In order to meet the special needs, some flexible technical treatment methods are put forward.

The basic rules for spelling Chinese Pinyin are formulated as follows:

1, with words as the spelling unit, with due consideration to phonetic, semantic and other factors, as well as the appropriate length of word forms.

2. It is basically described by grammatical parts of speech.

3. Rules should be as simple as possible to facilitate application.

Baidu encyclopedia-pinyin