What happened to the most powerful son-in-law in history?

Meet Jin Mulan on Earth in the finale.

The hero, the emperor of Dagan Empire and the son of Li Jiang, was born and raised in the previous life, and his medical skills were superb. He was disfigured by an accident and went to another world after his death. He has the ability of computer brain and X-ray eyes, and saved the day again and again with wisdom and courage. He was defeated by Li Jiang when he first went to Bai Yujing, and was later recast by the ancient Ming King and the mother of dragons. Ten thousand people, such as Queen Medusa, the mother of dragons, and Yi Gang, completed the realization of the high-order dragon under the sacrifice of the ancient robbery temple, and completed the realization of the ultimate dragon when they fought against Li Jiang on the moon, and finally led mankind through the great destruction, entered the interstellar era, and met Jin Mulan on earth in the finale.