Secret Agent's Concubine: from Substitute Princess to Empress

[Ace Agent] Dressed as a desperate concubine, she was given poisoned wine by a violent prince on the night of the wedding. She drank it calmly and pulled out the poisonous hairpin to hold it against the male protagonist's throat. She pretended to be a docile princess in front of others, and she overturned the court to reach the peak of power. The powerful King Su finally fell into a red-eyed courtship, but she wore a dragon robe and smiled lightly: "Your Majesty, I only want the country, not the romance."