Datang: to Seize the Throne Does Not Necessarily Require the Use of Weapons

After traveling through time and becoming Li Tai, it was not easy to be Li Shimin's legitimate second son. He was really favored, but it was a pity that it was of no use. In the end, he didn't end up making wedding clothes for others. If you can't become the emperor, you may have to be exterminated, but seizing the throne is not that simple. Didn't the cheap brother Li Chengqian fail in launching mutinies in history?