- 中古屋 zhōnggǔwū second-hand housea pre-owned house or apartment building available for resale
- 中古时代 zhōnggǔshídài Middle Agesthe medieval period of history or the Middle Ages
- 中古汉语 zhōnggǔhànyǔ Middle Chinese; Medieval ChineseThe stage of the Chinese language documented in rhyme dictionaries such as the Qieyun, typically associated with the Sui, Tang, and Song dynasties
- 中古车 zhōnggǔchē used carA second-hand or previously owned vehicle; a used car