Western countries do not recognize that China has a civilization of 5,000 years. It was not until the discovery of Oracle Bone Inscriptions in the early 20th century that the history of China was extended to 3000 years ago. The recent "Xia Shang Zhou Dating Project" is a huge project to find the lost chronology of Chinese history. However, due to the lack of written records, it is still pending. Even if some theories are put forward, they are far-fetched, which is the charm of words.