Strategy for Conquering the Tang Dynasty

When the iron cavalry rides across the mountains and plains, when the blade of the sword comes to the head, the prosperous Tang Dynasty is no longer, only a chaotic Tang Dynasty with strong external power and industriousness. Barbarians invade the border, vassal towns cause chaos, palaces are in chaos, and eunuchs are in power. There was a man who was raised among the refugees. One thought was to support the Tang Dynasty, and the other thought was to oppose the Tang Dynasty. Li Longji, don't force me to rebel! He is the son of the poet Li Bai. From the beginning, he only wanted to guard this piece of Han land, but overnight, he planted the Tang flag on a land outside Kyushu. Your Majesty, Your Majesty, your Highness, where should I go?