my country's water conservancy construction has been valued by people of all nationalities since ancient times.After thousands of years of unremitting efforts, people have made brilliant achievements and built thousands of water conservancy facilities one after another. This book selects 10 of the more important projects and introduces them to readers.Projects 1 to 3 are canal projects, Projects 4 to 8 are irrigation and drainage projects for farmland, and Projects 9 to 10 are embankment projects.The content of each project includes: construction purpose, process, historical evolution (focusing on ancient times, linking to modern times), engineering characteristics, social benefits and lessons learned.Hope to provide readers with more systematic knowledge of these projects.

In the book, there are many places that refer to units of measurement such as chi, li, mu, bucket, and catty in the past dynasties.In order to facilitate the conversion of readers, a brief conversion table of weights and measures in the past dynasties is attached at the end of the book.