China at the dawn of history was much warmer and wetter than it is today, with elephants, rhinoceroses and crocodiles living north of the Yangtze River.

• 回溯到久远的历史以前，中国这片土地要比现在更温暖、更潮湿，长江北部生活着大象、犀牛和鳄鱼等动物。