Comparing the Two Tang Dynasties, What the Hell Is the Immortal Emperor Li Shimin?

In the tenth year of Zhenguan, Queen Changsun was critically ill, Prince Li Chengqian gradually fell out of favor due to foot disease, King Li Tai of Wei was ambitious, and undercurrents were surging in the Tang royal family. Just as Li Shimin was waiting in front of his wife's bedside with his heart pounding, a dark curtain descended on Chang'an, blocking out the sun and forcibly starting the "Dual Realm Datang Comparison Live Broadcast"! Above the sky, a completely different parallel time and space, the world of Xian Tang, is playing. Looking at the scene in the sky, the monarchs and ministers of the Tang Dynasty in the original world were completely defeated, and Li Shimin burst into tears on the spot. The prince of the former world, Li Chengqian, crippled and rebelled, and died miserably in exile; but the prince of the Immortal Tang Dynasty washed his marrow and reshaped himself, transformed into a white-robed swordsman, and ran away with his sword overnight in order to no longer be the emperor: "Father, approving memorials will greatly affect the speed of my son's drawing of the sword!" The king of Wei in the original world, Li Tai, swore a poisonous oath to kill his son to pass on his younger brother in order to seize the throne; but the king of Wei in the Tang Dynasty was addicted to forging iron and making weapons, and regarded the throne as a piece of shit. In order to shirk the throne of the crown prince, the two brothers actually fought in public in the court. In the original world, Princess Changle died of an illness at an early age, and the little Sizi died at the age of twelve, which became a pain in the life of the emperor and the queen. Princess Changle of the Immortal Tang Dynasty awakens her water spirit root and transforms into the goddess of rainfall to seduce the common people; Xiao Sizi rides the beast that protects the country as a dog, and has a long life! Seeing that the Tang Dynasty, a fairy family that had ascended to great heights and had no fratricide, only a loving father and a filial son, Li Shimin from the original world kicked over the dragon chair. This throne is nothing! I also want to become an immortal! I also want to lead Datang to start over again!