Throne of Magical Arcana

An ordinary young man on earth, Xia Feng, traveled to a world of sword and magic, and took the body of Lucien Evans, another ordinary young man.
Seemingly this was a world of traditional western fantasy, yet he discovered the astonishing similarities between the earth and this world, and between science and the so-called arcane magic…
“Knowledge is power”? Soul, magic, quantum, Theory of Relativity, cognitive world, music and real world……
What was the true nature of that world?