The rules for uppercase and lowercase Chinese Pinyin letters are as follows:

1. The first letter at the beginning of a sentence must be capitalized.

Example: Táo shù kāi huā le

The peach trees are blooming.

2. The first letter of a proper noun should be capitalized.

Example: Mián yáng

Mianyang

3. The first letter of the surname and first name should be capitalized.

Example: Guō Mò ruò

Guo Moruo

4. Titles, trademarks and signboards are generally all capitalized.

Example: XIAO XUE ZUO WEN

Elementary school composition

Zhi shi Shou ce

Knowledge manual

Chinese Rules for uppercase and lowercase Pinyin letters (recommended for parents to collect for their children)