How to write pinyin in the first grade of primary school?

The pinyin of the first grade of primary school is written in the four-line box as follows:

Pinyin letters, some occupy one grid, some occupy two grids, and some occupy three grids. Pay attention to the position of each letter in the four-line grid.

For example, a, o, e, u, ao, ou, er, an, en, un, m, n, x, r, z, c, s, w are all blank pinyin;

I，u，ai，ei，iu，ie，u e，iu，yuan，ang，eng，ying，ong，b，p，f，d，t，l，g，k，h，q，zh，ch，sh，y，zhi，chi，ri，zi。

J is a three-grid pinyin.

Extended data:

Hanyu Pinyin is a Latin scheme of Hanyu Pinyin officially promulgated by People's Republic of China (PRC). It was studied and formulated by the Chinese Pinyin Scheme Committee of the former China Language Reform Commission (now the State Language Commission) during the period of 1955 to 1957 language reform. This pinyin scheme is mainly used to mark the pronunciation of Putonghua and Chinese as the phonetic symbol of Chinese characters. The National People's Congress1958 February 1 1 approved the announcement of the plan.

Chinese Pinyin is a tool to assist Chinese pronunciation. Article 18 of the General Language and Characters Law of People's Republic of China (PRC) stipulates: "The Chinese Pinyin Scheme is a unified standard for spelling Roman letters in Chinese names, place names and Chinese documents, and it is used in areas where Chinese characters are inconvenient or unusable." The symbols written according to this set of norms are called Chinese Pinyin.

This draft * * * has 3 1 letters, including five new letters (dotted line I; Long legs n; Z, c, s) has a tail, thus realizing "one word and one sound" without inflections and double letters. After the publication of the draft, it caused a heated discussion throughout the country, and even overseas Chinese and overseas students put forward their own opinions.

Baidu encyclopedia-pinyin