What are Wei Yuan's works? What does he propose in this book? What's the role?

Atlas of the Sea is the masterpiece of Wei Yuan, a famous thinker in modern times.

Put forward the idea of "learning from foreigners to control foreigners";

This book is a systematic introduction to western history, geography and scientific and technological knowledge. At that time, it was called the "encyclopedia" of introducing world knowledge compiled by China people, which had an important enlightening effect on China's ideological circle.