Research shows that **North China** experienced a **humid climate** 2,200 years ago, contributing to agricultural prosperity.
Rainfall was **18 to 34 percent higher** during the Qin dynasty compared to modern levels, fostering socio-economic growth.
The study, published in the **Proceedings of the National Academy of Sciences**, indicates that wetter conditions supported large-scale food production.
Findings suggest that similar climate patterns observed today in northwest China could benefit future agricultural practices.
The **Chinese Meteorological Administration** notes that recent decades have seen increased humidity, particularly in western regions.
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