Wǒ zài Wǔbā Tóngchéng shàng kàn dào le yí gè dānjiānchūzū de guǎnggào.
I saw a single-room rental ad on 58.com.
Tips
usage
单间出租 is a standard listing phrase on Chinese classifieds (58同城, 豆瓣租房). It means one bedroom in a shared flat — kitchen and bathroom are communal. Not to be confused with 单身公寓 (a self-contained studio).