Fig. 1: Maps showing the geographic locations of 19 Neolithic walled towns in the middle Yangtze River valley of China.

a the study area and geographic location of Fenghuangzui. b geographic locations of 19 walled towns (1 Fenghuanzgui, 2 Shijiahe, 3 Zoumaling, 4 Chengtoushan, 5 Longzui, 6 Tucheng, 7 Wangguliu, 8 Zhangxiwan, 9 Yejiamiao, 10 Menbanwan, 11 Taojiahu, 12 Xiaocheng, 13 Chenghe, 14 Majiayuan, 15 Yinxiangcheng, 16 Jimingcheng, 17 Qinghe 18 Jijiaocheng, 19 Qixingdun).