Warhammer: in the Name of the Emperor, Change the Course of Events

Bad news: Time traveled. Even worse news: time traveled to the Warhammer world. "Destroy it as you please! I want to be a Sigma man!" Xu Yuan roared in despair at the world. "What does it mean that we are all descendants of Sigma?" Wow, it turns out to be a medieval warhammer. But Xu Yuan saw in his dream the "cold sun" that should not exist here and the majestic figure in golden armor. He discovered that this world was "slightly" different from the medieval warhammer he knew... ------------------ Several years later, His Excellency Xu Yuan, the Chosen Emperor, Lord Protector of the Empire, son-in-law of the Dragon Emperor, the unquestionable ally of the dwarves, the most trustworthy companion of the elves, and the alien brother of the eldest son of the ancient saint, gave a speech in Altdorf. "Recently, I sent a letter to Grand Marshal Archaon of the Chaos Troops, requesting both sides to stop fighting and make peace in a friendly manner. I didn't expect that he would not allow it!" "That's good! If he invades, I will invade too! If he dares to launch the Endgame, then I will go straight to Huanglong and enter the hometown of the Four Gods!" "Everyone, for the sake of the land beneath your feet, let the Chaos Demon Realm burn!" (Medieval Warhammer world view, but some settings and elements from 40k will be introduced) [Not knowing Warhammer does not affect reading, some basic settings will be added slowly in the future]