In the beginning, Yanan was just a small, remote town. Even the Yanan people had forgotten where this place had come from. The historical documents about this small town were only preserved in the only academic institution in Yanan, the "Byron Weiss Academy."
In fact, Yanan's geographical location was originally the center of the ancient country called the "Sumerian civilization," but the Sumerian civilization had long disappeared in the long river of history. Only the occasional excavation of Sumerian tombs could reveal the glory of the ancient civilization.
The Byron Weiss Academy had developed a strong interest in excavating the ancient Sumerian civilization. As more and more ancient tombs were excavated, the scholars discovered that the ancient tombs contained a lot of incomprehensible knowledge, such as "ancient gods,""beast disaster,""higher beings,""eyes,""beyond thought," and so on.