Why didn't Wang Yishan admit that she was a crown princess?

Wang Yishan has admitted to Miss Da that she is a Crown Princess. She refused to admit Zuo Guangdou because she didn't want to go back to the Ming Dynasty and marry a man she didn't love.

She said that when she was hunted down that day, she somehow came to modern times. For some reason, she crossed 20 12, five years earlier than Zuo Guangdou, so it is more suitable for modern life. Although she still likes Zuo Guangdou very much, when she said that she would elope with Zuo Guangdou that day, Zuo Guangdou said that she didn't dare to cross it. She knew he was just a fool, so she didn't even recognize him.