Two of China's main geographical features are the Yellow River and the Yangtze River.
The Yellow River is sometimes called "The Cradle of Civilization" because the ancient civilization was built along the banks of the river. It is the sixth longest river in the world at 3,395 miles long. The fertile yellow silt along the banks of the river were ideal for farming.
The Yangtze River is the third longest river, measuring 3,988 miles long. The Yangtze was a good boundary between northern and southern China, for it was very difficult to cross.
The highest mountains in the world, the Himilayas, to the south and southeast of China, acted as a nearly impassible barrier.
Two of the world's largest deserts, to the east and west of China, also acted as borders to separate China from the rest of the world. The deserts were the Gobi and Taklamakan.
The climate in Ancient China ranged from tropical to polar weather.
Social structures have a very long history, going from the feudal society of imperial times to the industrializing and urbanizing society of today.
In first class were the kings and nobles; they were at the highest level.
Then came the lords and warriors, they were in the second class.
Lastly were the peasants, they were in the lowest class.