In eastern China, ancient ruins are pushing back the date of Yangtze delta’s earliest cities

Chinese archaeologists unearthing the ruins of the earliest known settlement in the Yangtze River Delta say water management may have been the origin of ancient “cities” in the area. Researchers began large-scale excavations of the Doushan site in Wuxi in the eastern province of Jiangsu in July last year, dating the city to about 6,000 years ago. Previously, the oldest urban site in the delta area was the Liangzhu culture site near Hangzhou in Zhejiang province, dating back about 5,300...