This is a full-length romance novel. Three years ago, she, Yiguang, princess of Qi, was publicly rejected in marriage and forced to enter a betrothal with another state. Her brother, Wuyan, Marquis of Yu in Qi, has always doted on her, no matter what upheavals they face. Little do they know that when her true origins come to light, he is revealed to be no blood brother of hers, but a prince of their enemy state, Chu. They struggle in anguish, yet the feelings they have suppressed for years can no longer be hidden. But for the sake of their country, they must endure again and again, and part ways. Their fates are tightly intertwined, composing a grand and tragic song amid the chaos and dust of the Warring States...
It's so complicated, everyone has two identities, but "The Flower in the Palace" by Sister Biao is better.