Why did Empress Dowager Cixi harm princess royal?

In order to break up princess royal and Yu Wenlin in Liyang. The Empress Dowager doesn't like princess royal in Liyang. In order to break up Yu Wenlin in princess royal and Liyang, she wants to kill the princess. Going against the Phoenix is a book published by Jiangsu Literature and Art Publishing House in February 20 14. The author is Luffy. The novel mainly tells the story of princess royal's only first daughter, who changed from a waste to a genius, turned an enemy into a friendship, and covered her hands for the rain.