1. 王子 (wáng zǐ) This is the most common and literal translation, meaning "king's son". It's used for the sons of a king or emperor.
2. 親王 (qīn wáng) This translates to "close king" or "prince of the blood" and is used for members of the royal family who are not the direct heir. It can also refer to a duke or prince who is a member of a royal family.
Therefore, the best translation for "prince" depends on the context.