Do you capitalize the word Chinese in a sentence?

Yes, you generally capitalize "Chinese" when it refers to the language, people, or culture.

Here are some examples:

* The Chinese language is tonal.

* He is studying Chinese history.

* I love Chinese food.

However, you wouldn't capitalize "Chinese" if it refers to something made in China:

* She bought a Chinese vase.

* He wore a Chinese silk shirt.

The key is to think about whether "Chinese" is acting as an adjective describing something specific or as a noun referring to a group of people or a language.