This is the 629th most frequent Japanese word.
中華
"Chinese" or "Chinese cuisine."
Here, '中華' (Chūka) is used as a modifier to '料理' (cuisine), meaning 'Chinese cuisine'.
私は中華料理が大好きです。
I love Chinese cuisine.
'中華街' (Chūkagai) combines '中華' (Chinese) and '街' (street or district) to refer to 'Chinatown'.
中華街を歩いてみましょう。
Let's take a walk in Chinatown.
'中華風味' (Chūka fūmi) uses '中華' (Chinese) to describe a characteristic or style, '風味' (flavor) in this case.