Early Tang Dynasty Strategy

Qin Shou traveled through the early Tang Dynasty with a mission, and accidentally triggered a series of butterfly effects, tampering with the fate of the famous generals and Princess Qunfang in the early Tang Dynasty, and achieved their glorious achievements with the heaven-defying bracelet. In order to regain the space-time ball, Qin Shou abandoned his original intention and principles, made soup and befriended the villainous ministers, fought wits and courage to get closer to Li Shimin step by step, and finally discovered the secret of the space-time ball. What choice should Qin Shou make?