During the Banpo man time or in the Middle Holocene, 5000~6000 Bp, the climate within the modern glaciation best fitted vegetation and the intrusion of some sub-tropic trees was postulated to have taken place.

• 古土壤代表间冰期夏季风盛行的湿热气候，植被比较繁盛；黄土代表冰期冬季风盛行的干冷气候，植被凋凌。