Zhōngguó shì shìjiè shàng zuì dà de tǔdòu shēngchǎn guó.
China is the world's largest potato producer.
Tips
usage
土豆 is the northern Chinese word for potato. In the south, it's called 马铃薯 (mǎlíngshǔ) or 洋芋 (yángyù). Don't confuse it with 花生 (peanut), which is sometimes called 土豆 in some dialects!