What kind of story did Liu Yi's letter tell?

" Liu Yi's Letter " was an ancient Chinese romance novel that told the story of the love between the ancient Chu Prince, Chu Wang, and the Qin Princess, Qin Ying. The main plot of the story was as follows: Prince Chu of Chu and Princess Qin Ying of Qin were in love, but there was a huge political obstacle between the two countries. Qin Ying's father was the king of Qin, while Chu's father was the king of Chu. The relationship between the two countries had always been tense. In order to break this situation, the King of Chu decided to send a letter to the State of Qin asking for a trusted aide, hoping that Qin Ying would marry him. However, he did not know that his request for a trusted aide had already been known by Qin Ying's father. Qin Ying's father didn't want her to marry the prince of Chu, but the prince of Qin. The king of Chu sent a letter to Qin Ying's father asking for a trusted aide, but Qin Ying's father did not reply to him. Lord Chu was very disappointed, but he did not give up. He decided to personally go to the Qin Country to plead with Qin Ying's father. In the State of Qin, King Chu met Qin Ying's father. He expressed his love to his father and asked his father to let him marry Qin Ying. Qin Ying's father finally agreed to King Chu's request and allowed King Chu to meet Qin Ying. After King Chu and Qin Ying met, their relationship gradually deepened. However, they also knew that their relationship was not allowed by the rulers of the two countries. Therefore, they decided to elope to avoid the political obstacles between the two countries. They encountered many difficulties and challenges on their journey, but they always supported each other and finally reached a mountain peak. There, they decided to settle down and live a free life. At the end of the story, the king of Chu and Qin Ying finally overcame the political obstacles between the two countries and their love had a happy ending.