relating to China; toward China; with China
Used as a prefix or in compounds to indicate a relationship, policy, or attitude directed toward China. Common in political, economic, and diplomatic contexts.
We need to review our policy toward China.
Trade with China is expanding year by year.
The government announced that it would review its China policy.
対中 means toward China, whereas 対日 means toward Japan (usually used from a foreign country's perspective), so the two are easy to mix up in news headlines.
strategy toward China; China strategy
Compound of 対 (たい, 'toward, versus') and 中 (ちゅう, abbreviation for 中国, 'China').