* When referring to people: Chinese is already plural. You wouldn't say "Chineses". For example: "The Chinese people are known for their hospitality."
* When referring to the language: Chinese is also already plural. You wouldn't say "Chineses". For example: "There are many dialects of Chinese."
* When referring to things made in China: You can use Chinese or Chinese goods (or similar). For example: "I bought some beautiful Chinese ceramics."
It's important to note that:
* "Chinese" as an adjective doesn't change for plural. "Chinese food" remains the same.
* For other nouns ending in "-ese" (like Japanese, Portuguese), the plural form is usually the same as the singular.