The beam bridge is a bridge with beams as the main load-bearing members, which was the earliest bridge type in China and was created as early as the Yin Dynasty. Due to the relatively simple structure and easy construction of beam bridges, especially the durable materials and labor-saving maintenance of stone beam bridges, they have become the most common bridge. There are approximately 1 million highway bridges in China, with beam bridges accounting for over 85% of the total. In this class, we will learn about the development history, structure, classification, and construction methods of beam bridges in China, especially the modern assembly and construction technology of beam bridges.