Zhèjiā chāojí shìchǎng èr shí sì xiǎoshí yíngyè, hěn fāngbiàn.
This supermarket is open 24 hours — very convenient.
Tips
usage
超级市场 is the full form; the abbreviation 超市 (chāoshì) is what everyone actually says in daily speech. 超市 is one of the most common abbreviated words in Mandarin.