Start as the Prince of Zhennan, sign in to the Snow Dragon Riders

Su Heng traveled through another world and became the prince of Zhennan. At the beginning, his father was murdered and he himself was poisoned. The royal family was eager to bypass him and let a bastard inherit the title.   Do you think my Zhennan Palace is too powerful to be trusted by the Lord? Want to get rid of the donkey after it has done its job?   OK! If you are unkind, don't blame me for being unjust.   The sign-in system is awakened. At the beginning, you sign in to the assassin organization Luowang, the two Xuanming elders, and summon the Snow Dragon Riders...   Do you want to control my Zhennan Palace? Then let's see whose method is better.   [The introduction is weak, please move to the main text]