第1讲 China Conquered or Not：The Effects of Dynastic Cycles and Climate Shocks（Ⅰ）.mp4
第2讲 China Conquered or Not：The Effects of Dynastic Cycles and Climate Shocks（Ⅱ）.mp4
第3讲 China Conquered or Not：The Effects of Dynastic Cycles and Climate Shocks（Ⅲ）.mp4
第4讲 China Conquered or Not：The Effects of Dynastic Cycles and Climate Shocks（Ⅳ）.mp4