I saw the trailers for episode 41 to 43. Now I understand more. Actually Prince Pangyu and Feng Xi are actually real brothers. Feng Xi is actually the second Prince. But he doesn’t want to be king. So he helps his brother Prince Pangyu to be king. And Feng Xi is actually Er Yu. Dong Yue is General Wen Xin. Both of them actually already dead but Er Yu died first and he has a special power. He use the lotus root to resurrect Wen Xin’s body to come alive and travel back 8 years before the war period. After the 3rd time of Dong Yue return, Dong Yue and Feng Xi successfully stop the war, they will need to leave the world. Both of their soul meet at the DongXing’s tree and their soul live happily together in another world. Really worth watching.