The first volume of seventh grade history is a masterpiece. Unit 3 16 in the first volume of the seventh grade history is characterized by excelsior. Tiangong Kaiwu is a book compiled by Song, a scientist at the end of Ming Dynasty, which summarizes the production technology of agriculture and handicrafts in Ming Dynasty. This book, with pictures and texts, records in detail the types, origin, planting and processing of various crops and handicraft raw materials, as well as handicraft production technology, and provides a large number of accurate data, and is known as the China Encyclopedia of Science and Technology in the17th century. Tiangong, written by Song He, an outstanding scientist in the late Ming and early Qing Dynasties, is a work summarizing the production technology of agriculture and handicrafts in ancient China, especially in the Ming Dynasty. The book has been translated into many languages, and is known as "/kloc-an encyclopedia of China's crafts in the 0/7th century".