Read manga: Princess Wei Yang

manga
Summary:

A young lady of the prime minister family, enduring for 8 years. Finally, at one day she was bestowed empress, Phoenix of the country! But life is unpredictable. Her husband loved her stepsister, deposed her as Empress and even forced her son into death. In that Cold Palace, she was forced to drink poisonous wine. So in the next lifetime, she made a promise to never do good deeds and help others, to never step into the palace and to never become the Empress!