The Crown Prince of Joy of Life did not give a clear answer to the Eldest Princess's attitude and feelings. Although the Crown Prince and the Eldest Princess had an unusual relationship, their specific feelings and attitudes were not explicitly mentioned. Therefore, based on the information provided, I am unable to determine Joy of Life's attitude towards the Eldest Princess.

In Joy of Life, the Crown Prince had deep feelings for the Eldest Princess, Li Yunrui. The Eldest Princess used her beauty to attract the Crown Prince and successfully controlled him. The Crown Prince's feelings for the Eldest Princess were twisted and complicated. He was deeply immersed in it and could not extricate himself. The Eldest Princess had no true feelings for the Crown Prince, and the Crown Prince was willing to work for her. Their private affair was eventually discovered by Fan Xian and made known to the Qing Emperor. The Qing Emperor was furious about the relationship between the Eldest Princess and the Crown Prince, but in the end, the Empress Dowager's plea saved them from death. The Eldest Princess was banished from the capital and the Crown Prince was sent to Nanzhao.
The Crown Prince had deep feelings for the Eldest Princess. The Crown Prince was attracted by the Eldest Princess's beauty and developed a strong sense of dependence and love for her. The Crown Prince had even drawn a portrait of a beautiful woman without a face. It was speculated that this woman was the Eldest Princess. However, the Eldest Princess did not have the same feelings for the Crown Prince. She used her charm and beauty to seduce the Crown Prince, and the two of them began a private relationship. This affair was eventually discovered by a young eunuch, Hong Zhu. Through the plot of the Overwatch Council Director Chen Pingping and Fan Xian, the Qing Emperor learned of this secret. The Qing Emperor was furious about this, causing the Eldest Princess and Crown Prince to fall into a dangerous situation. In the end, the Eldest Princess was banished from the capital and the Crown Prince was sent to Nanzhao. Thus, the Crown Prince's feelings for the Eldest Princess did not receive a response.
The relationship between Eldest Princess Li Yunrui and Crown Prince Li Chengqian was known by the Qing Emperor in " Celebrating Years." The Eldest Princess used her beauty and the Crown Prince's love to seduce the Crown Prince. The two of them began to have an aunt and niece relationship in the underground. However, their affair was eventually discovered by a young eunuch, Hong Zhu. Through the plot of the Overwatch Council Director, Chen Pingping, and Fan Xian, the Qing Emperor learned of this relationship. The Qing Emperor was angry at the Crown Prince and the Eldest Princess 'relationship. He stripped the Crown Prince of his position as Crown Prince and decided to execute the Eldest Princess. However, after the Empress Dowager saved her, the Eldest Princess was demoted to Xinyang. Thus, the relationship between the Eldest Princess and the Crown Prince did not receive the Qing Emperor's approval. In the end, it ended with their separation.
In Joy of Life2, 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. In the end, their relationship ended in suicide. After the Qing Emperor learned of the Crown Prince and Eldest Princess's affair, he deposed the Crown Prince and put the Eldest Princess under house arrest. After the Eldest Princess failed in her attempt to assassinate the Qing Emperor, the Crown Prince and Eldest Princess chose to commit suicide.
Joy of Life: The Crown Prince and Princess Royal refers to the plot between the Crown Prince and Princess Royal in the novel or TV series Joy of Life. The specific plot happened in the sixth volume of the novel, chapter 86, and also appeared in the 22nd episode of the TV series. In this plot, the Crown Prince persuaded the Eldest Princess to sacrifice herself in exchange for peace in the Crown Prince's family and prevent war from breaking out. However, the specific plot details were not mentioned in the search results provided. Therefore, the search results did not provide a clear answer to the specific plot and ending of Joy of Life's Prince and Princess Royal.
The relationship between the Eldest Princess and the Crown Prince in Joy of Life was discovered by the Qing Emperor. After the Qing Emperor learned of the Eldest Princess and the Crown Prince's private affair, he abolished the Crown Prince's position and placed the Eldest Princess under house arrest. The Eldest Princess had once planned to assassinate the Qing Emperor and push the Crown Prince to the throne, but after the plan failed, the Eldest Princess and Crown Prince chose to commit suicide. The relationship between them was revealed to the Qing Emperor by the protagonist, Fan Xian, leading to this ending.
In Joy of Life, the Eldest Princess and the Crown Prince had an affair. After their affair was exposed by Fan Xian, the Qing Emperor was furious and washed the Eastern Palace with blood. The Eldest Princess was under house arrest, and the Crown Prince was facing deposed. In the end, the Eldest Princess chose to commit suicide, and so did the Crown Prince. Their ending could be said to be within expectations. After all, in a power struggle, the winner was the king, and the loser was the bandit. After the Eldest Princess and the Crown Prince's affair was discovered, they could not escape the punishment of fate.
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Joy of Life: The Crown Prince and Princess Royal refers to the plot between the Crown Prince and Princess Royal in the novel or TV series Joy of Life. The specific plot happened in the sixth volume of the novel, chapter 86, and also appeared in the 22nd episode of the TV series. In this plot, the Crown Prince persuaded the Eldest Princess to sacrifice herself in exchange for peace in the Crown Prince's family and prevent war from breaking out. The side story may be an extension of Joy of Life's story, and may contain some plots or characters related to the main story. However, the details of the plot were not mentioned.
In Joy of Life, the Crown Prince and the Eldest Princess had a special relationship. There was no face in the Crown Prince's painting, but from the figure in the painting, it could be seen that it was the Eldest Princess. The Crown Prince had special feelings for the Eldest Princess, and this affair was eventually known by the Qing Emperor. When the Qing Emperor learned of this, he was furious. He abolished the Crown Prince's position as Crown Prince and prepared to execute the Eldest Princess. However, at the critical moment, the Empress Dowager came forward to save the Eldest Princess. She was demoted to Xinyang. The relationship between the Eldest Princess and the Crown Prince did not have a happy ending. Their feelings were not real.