I'd like to prepare a LaTeX document using a common format of displaying both Chinese characters and the corresponding romanization (pinyin) above each word. For an example, please refer to this page from a book.
Note that, in the example picture, the romanized text above is centered between the characters below. So, as in on the first line, it says "走读生" (one word, but 3 characters) and the corresponding pinyin text "\zou3\du2\sheng3" is centered above those 3 characters.