when it comes to中to的词性

中 (zhōng) can function as a preposition or an adverb in Chinese grammar.

As a preposition, 中 (zhōng) is often used to indicate "in" or "inside," as in 中心 (zhōngxīn) "center" or 中午 (zhōngwǔ) "noon."

As an adverb, 中 (zhōng) can have several meanings depending on the context. It can mean "moderately" or "somewhat," as in 中等 (zhōngděng) "medium" or 中规中矩 (zhōngguīzhòngjǔ) "conventional." It can also mean "in the middle" or "in between," as in 中间 (zhōngjiān) "middle" or 中途 (zhōngtú) "halfway." Finally, it can mean "among" or "amidst," as in 中文 (zhōngwén) "Chinese language" or 中美洲 (zhōngměizhōu) "Central America."