Let’s walk into the Yin Dynasty Ruins, reading thousands of inscriptions on bones or tortoise shells, enlightening the ancient civilization in the darkness of the history, connecting the ancient with modern, and leaving more elegance to our life. It’s difficult to research professionally the ancient oracle bone inscriptions as a major, and in this domain, it’s almost impossible to get the achievement in the short term. However, it is feasible and even necessary to have a general understanding of its features, functions, and some relevant basic knowledge and theories, so as to broaden our horizons, develop interests, and promote thinking. This lecture takes two class hours to discuss the following issues: to introduce the discovery and excavation process of Yin Ruins and oracle bone inscriptions; to analyze the primary role of the discovery of oracle bone inscriptions, that is, to prove the history of Shang Dynasty and to dispel the doubts about the history of Shang Dynasty in the world; specifically to analyze three messages of divination on oracle bone inscriptions, for getting the basic nature and structure of messages of divination, and to summarize the contents recorded with oracle bone inscriptions; to know about the structure and form of some common characters with oracle bone inscriptions, to analyze the consistency from oracle bone inscriptions to modern Chinese characters and the historical significance of this consistency; and to analyze the significance of the research on oracle bone inscriptions to the modern society.