What's the difference between metaphysical novels and fantasy novel? In addition, please recommend any good metaphysical novels.

Metaphysical novels are related to Zhouyi and are basically recorded in historical books. Fantasy novel is somewhat similar to the former, only more unconstrained and unconstrained style, there is no historical data to test. I think Ghost Rain is the best metaphysical novel. "Taoist and Confucian immortals", super beautiful. There is "Ghost Rain Master", but unfortunately I didn't finish it. In fact, the trilogy of wild fox under the tree should also be counted.