I Ruled the Realm of Mountains and Seas for Seven Years, and You Say I'm Still on Earth

Li Xuan has spent a full ten years in the Shan Hai Realm. With the help of his System and overwhelming strength, he has subdued the various tribes and founded a kingdom, becoming its king. Then, in the blink of an eye, a plane falls from the sky. The moment he sees people from Earth, Li Xuan’s mind fills with questions: ?? What’s going on... am I still on Earth??