Zhànhuǒ cuīhuǐ le gǔchéng, liú xià duàn bì cán yuán.
War destroyed the old city, leaving only broken walls and crumbling fences.
Tips
usage
A set pair of images for ruins: 壁 = wall (of a building), 垣 = enclosure wall. Common in news reports on disasters, war zones, and abandoned heritage sites.