Also, from the Eastern Han (25-220) onward, the political center gradually moved from north China to south of the Yangtze. This geographical shift brought with it a gradual change in spatial attitudes. The limestone geology of southern China has endowed it with many deep and mysterious caves which nature has fashioned into remarkable shapes, and these constantly fired human imaginations.
東漢後政治中心又逐步由華北進入江南，人們活動空間遷徙，空間觀念也逐漸改變，江南石灰岩地形裡洞窟、洞穴神秘幽深，巧奪天工，也不時刺激著人的想像。