The relationship between the Crown Prince and the Eldest Princess was rather special in Joy of Life. In terms of family relations, the Crown Prince was the Crown Prince, the heir to the throne, and the Eldest Princess was the Princess Consort's younger sister, the Crown Prince's aunt. So, from this point of view, the Crown Prince and the Eldest Princess were like an aunt and nephew. However, in the story, the relationship between them was not as bland as that of an ordinary aunt and nephew. On the contrary, there was a deep relationship between them. Ever since they were young, the Crown Prince and Eldest Princess had relied on each other, and they both valued each other very much. The Crown Prince rarely received the attention and love of his parents, so the Eldest Princess became his most important support. The Eldest Princess also felt a sense of security and happiness because of the Crown Prince's company. As they grew older, the relationship between the Crown Prince and the Eldest Princess also became deeper. They trusted each other and treated each other well.

In " Celebrating Years," the relationship between the Eldest Princess and the Crown Prince was that of an aunt and nephew. The Crown Prince was the Crown Prince, the heir to the throne, and the Eldest Princess was the Princess Consort's sister, the Crown Prince's aunt. They had relied on each other since they were young, valued each other, and established a deep relationship. However, according to the information provided, they chose to commit suicide.
In Joy of Life, the relationship between the Eldest Princess and the Crown Prince was that of an aunt and nephew. The Crown Prince was the Crown Prince, the heir to the throne, and the Eldest Princess was the Princess Consort's sister, the Crown Prince's aunt. They had relied on each other since they were young, valued each other, and established a deep relationship. However, according to the information provided, they chose to commit suicide.
In Joy of Life, the relationship between the Crown Prince and the Eldest Princess was that of an aunt and nephew. The Crown Prince was the Crown Prince, the heir to the throne, and the Eldest Princess was the Princess Consort's sister, the Crown Prince's aunt. They had relied on each other since they were young, valued each other, and established a deep relationship. Even though the Crown Prince's marriage was arranged by his parents, there was not much contact between them.
In Joy of Life, the relationship between the Eldest Princess and the Crown Prince was that of an aunt and nephew. The Crown Prince was the Crown Prince, the heir to the throne, and the Eldest Princess was the Princess Consort's sister, the Crown Prince's aunt. They had relied on each other since they were young, valued each other, and established a deep relationship. They trusted each other and treated each other well. However, in the play, their relationship did not develop as simple as an ordinary aunt and nephew. There was an affair between them that transcended ethics. In the end, after the Qing Emperor learned of their affair, he abolished the Crown Prince and placed the Eldest Princess under house arrest. The Crown Prince and Eldest Princess eventually chose to commit suicide.
During the Qing years, the Eldest Princess and the Crown Prince's relationship was that of an aunt and nephew. The Crown Prince was the Crown Prince, the heir to the throne, and the Eldest Princess was the Princess Consort's sister, the Crown Prince's aunt. They had relied on each other since they were young, valued each other, and established a deep relationship. Although the Crown Prince's marriage was arranged by his parents, their relationship was not as simple as that of an ordinary aunt and nephew. They trusted each other and treated each other well. However, in the play, their relationship did not develop as simple as an ordinary aunt and nephew. There was an affair between them that transcended ethics. In the end, after the Qing Emperor learned of their affair, he abolished the Crown Prince and placed the Eldest Princess under house arrest. The Crown Prince and Eldest Princess eventually chose to commit suicide.
In Joy of Life, the relationship between the Crown Prince and the Eldest Princess was that of an aunt and nephew. The Crown Prince was the Crown Prince, the heir to the throne, and the Eldest Princess was the Princess Consort's sister, the Crown Prince's aunt. They had relied on each other since they were young, valued each other, and established a deep relationship. Although the Crown Prince's marriage was arranged by his parents, their relationship was not as dull as that of an ordinary aunt and nephew. The Crown Prince and the Eldest Princess trusted each other in the drama and treated each other very well. However, the specific plot and development were not clearly described in the search results provided.
In Joy of Life, the relationship between the Crown Prince and the Eldest Princess was that of an aunt and nephew. The Crown Prince was the Crown Prince, the heir to the throne, and the Eldest Princess was the Princess Consort's sister, the Crown Prince's aunt. They had relied on each other since they were young, valued each other, and had deep feelings for each other. However, their relationship did not develop as insipid as an ordinary aunt and nephew. They trusted each other and treated each other well.
The Qing Emperor had learned of the private affair between the Qing Eldest Princess Li Yunrui and the Crown Prince Li Chengqian through the exposure of a small eunuch, Hong Zhu. Under the arrangements of the Overwatch Council Director Chen Pingping and Fan Xian, Hong Zhu used the Qing Emperor's suspicious personality to expose his private affairs to the Qing Emperor. The Qing Emperor therefore banished the Eldest Princess and the Crown Prince was sent to Nanzhao. As for the specific details and development of their relationship, the search results did not provide any relevant information.
In " Celebrating Years," the relationship between the Crown Prince and the Eldest Princess was that of an aunt and nephew. The Crown Prince was the Crown Prince, the heir to the throne, and the Eldest Princess was the Princess Consort's sister, the Crown Prince's aunt. They had relied on each other since they were young, valued each other, and established a deep relationship. However, in the play, their relationship did not develop as simple as an ordinary aunt and nephew. There was an affair between them that transcended ethics. In the end, after the Qing Emperor learned of their affair, he abolished the Crown Prince and placed the Eldest Princess under house arrest. The Crown Prince and Eldest Princess eventually chose to commit suicide.
In Joy of Life, the relationship between the Crown Prince and the Eldest Princess was that of lovers. The Eldest Princess had sent people to assassinate Fan Xian. In order to take revenge on the Eldest Princess, Fan Xian had told the Emperor that the Crown Prince and the Eldest Princess had a special relationship. Fan Xian used a series of plans to let the empress discover the relationship between the Crown Prince and Eldest Princess and inform the Emperor of this matter. The Qing Emperor also had special feelings for the Eldest Princess. After learning of the relationship between the Crown Prince and the Eldest Princess, he placed the Eldest Princess under house arrest and prepared to depose the Crown Prince. The Eldest Princess and the Crown Prince secretly joined forces with the Qin family and the Ye family to kill the Qing Emperor and let the Crown Prince ascend to the throne. However, their plan was leaked by the Ye family. After the rebellion failed, the Eldest Princess and Crown Prince chose to commit suicide.