My father, Li Shimin, requests Your Majesty to address him as the Crown Prince

There are four emperors of the same age, but they cannot come up with a crown prince in the order of succession. Traveling through Li Chenggan, facing Li Shimin's favorience and the aggressive attitude of Prince Li Tai of Wei. If one wants to ascend the throne, one can only abide by the inheritance law of the Xuanwu Gate. Rebellion is for self-rescue. "Chenggan." " "Your Majesty, please address me as the Crown Prince!" " "I'm lame. I don't look like an emperor." " "Even if you turn the Zhenguan era of prosperity into the most prosperous one in the world, it's because our entire family has rebelled." " "History books won't record that you inherited in order either." " "I'm going to wait at my mother's grave right now." " "Whether you bestow three feet of white silk or poisoned wine." " "Take this seat all the way to the end. Don't give it to me!" " Several years later, Li Chenggan came to the imperial palace again. "Your Majesty, please ascend the throne of the Supreme Emperor." "