Stage | Period | Dynasty | Climate | Feature |
I | 10,000-4000 B.P | Neolithic age | warm humid | Abundant river course, vast forest and grassland |
II | 4000-3500 B.P | Xia | cold humid | Increased river runoff, emerging of civilizations |
III | 3500-2500 B.P | Shang, West Zhou, Chunqiu Period | warm dry | Geochemical elements indicate the warm and dry environment |
IV | 2500-2000 B.P | Warring States Period, Qin, Han | cold humid | Suitable for cultivation |
V | 2000-1500 B.P | Wei, Jin, Southern and Northern Dynasties | warm dry | Reduced ground water, restricted farming activities |
VI | 1500-1000 B.P | Sui, Tang, the Five Dynasties | cold humid | Re-flourished Social Activities |
VII | 1000 B.P-date | Yuan, Ming, Qing | warm dry | Rise in temperature, increased precipitation, and intensified drought |