Chéngyī hángyè shì Zhōngguó zhòngyào de chūkǒu chǎnyè.
The ready-made garment industry is an important export sector for China.
Tips
usage
成衣 contrasts with 定制 (custom-made/bespoke) clothing. As a compound: 成 (finished/ready) + 衣 (clothing). Used in trade and fashion industry contexts, especially in manufacturing discussions.