The inner and outer world: Beneath (or intertwined with) the "real" world we live in, there is an "inner world" composed of ancient legends, forbidden knowledge, residual divine power, and strange beasts and spirits. This world is not completely independent, but is connected or penetrated with reality through various "nodes" (ancient tombs, ruins, specific locations, special items, blood inheritance, specific rituals).
The Secret History of China: Beyond the orthodox historical records, there are "secret histories" that have been deliberately covered up or forgotten. Three Sovereigns and Five Emperors, Xia, Shang and Zhou, Pre-Qin alchemists, Qin and Han dynasties seeking immortality, Tang and Song Dynasties Danding, Ming and Qing secret sects... Behind every glorious dynasty, there are rulers or secret groups who are madly pursuing immortality or controlling extraordinary power. Many major historical events have the shadow of "inhuman" forces behind them.
The truth behind "The Classic of Mountains and Seas": It is not about myths and legends, but about the "geography", "biology" and "energy" of lost civilizations. Most of the strange mountains, strange waters, mysterious beasts recorded in the book actually exist (or once existed), are located in secret realms that ordinary people cannot reach (such as folded space, the inner earth world, and the deep sea return to ruins), or are the embodiment of some kind of energy/law. It is an important map and key to the secrets of immortality.
