Datang: the Crown Prince Has Just Been Established, and the Counterattack System Is Coming

[You have been the prince for eighteen years, but you have not been able to prove to your father that you are a qualified prince. You are tired. Your rebellion has failed and you have been deposed as the prince. [The counterattack system is activated, and the host is asked to return to the position of prince. The reward is: Taixuan Health Sutra, which can cure lameness. Li Chengqian, who was only eight years old, fell into deep thought when he saw the blood on his hands was still wet, and Li Shimin, who was proudly anointing himself as the crown prince, thought... The system seemed to have arrived too early. One more thing. My legs are not lame! Uh... Li Chengqian couldn't hold back. How about giving Father some excitement? ? [It is detected that the host's mood fluctuates greatly. You can choose to complete side tasks to speed up your return to the position of prince. Side mission one: Kill Li Tai, kill Li Zhi, and take their heads to see Li Shimin...] Li Chengqian: "No, this is too exciting!"