Characteristics, causes and functions of houses in Banpo site and Hemudu site. And other historical issues.

1 half slope features: semi-recess type; Cause and function: Xi 'an, Shaanxi Province, located in the Yellow River basin, has a dry climate and few rivers, and is sheltered from the wind and cold.

Hemudu characteristics: dry column type; Reason and function: Yuyao, Zhejiang, located in the Yangtze River basin, with warm and humid climate, dense water network, dry fence buildings above the ground, ventilation and moisture-proof.

2 Africa's Lower Nile Delta: Ancient Egyptian Civilization (5000 BC)

Ancient Civilization in the Middle Nile of Africa in Sudan (4500-4000 BC)

Asian Mesopotamian civilization (3500 BC)

Ancient Indian Civilization in the Indus Valley of Asia (3000 BC)

Crete civilization Crete is a Mediterranean island in Europe (3,000 years ago) and will develop into a Greek civilization in the future.

Maya civilization in North and South America and Mexico (2500 BC)

Inca civilization in Peru, Chile, Colombia and other places in South America (originated in 3000- 2000)

3 Thailand

4. Jian Zhen and Japan