When are pinyin letters capitalized?

Capital 1, the first letter at the beginning of proper nouns such as country name, place name, person name and book registration. In sentences, such as: China people * * and Jing M.Guo, Lu Xun, LǔXùn, Romance of the Three Kingdoms. 2. The first letter at the beginning of each paragraph of the article and the first letter at the beginning of each line of the poem should be capitalized. 3. Store names, trademarks, shop signs and other places can be capitalized, or tones can be omitted. According to the scheme of Chinese Pinyin, the syllables of the same word should be written together and the words should be written separately.