Researchers find rainy, humid climate in ancient north China contributed to to agricultural boom and prosperity of Qin and Han dynasties.
The main idea of the text is that a humid climate in ancient North China around 2,200 years ago fostered an agricultural boom, leading to the prosperity and success of the Qin and Han dynasties.
The researchers believe that the consistent rainfall and warm temperatures during this period helped increase food production, contributing to economic and population growth.