The Eldest Princess is actually the Second Prince's subordinate.

The Eldest Princess worked with both the Second Prince and the Crown Prince, so she was both the Second Prince's and the Crown Prince's person. On the surface, she supported the Crown Prince, but in reality, she had formed an alliance with the Second Prince and was using the Second Prince to seek benefits for herself. The Eldest Princess was a person with a strong desire for power. She used her status and influence to influence the situation and tried to make the Crown Prince ascend the throne. Thus, the Eldest Princess was cooperating with both the Second Prince and the Crown Prince. Her true choice was the Crown Prince.

The Eldest Princess worked with both the Second Prince and the Crown Prince, so she was both the Second Prince's and the Crown Prince's person. On the surface, she supported the Crown Prince, but in reality, she had formed an alliance with the Second Prince and was using the Second Prince to seek benefits for herself. The Eldest Princess was a person with a strong desire for power. She used her status and influence to influence the situation and tried to make the Crown Prince ascend the throne. Thus, the Eldest Princess was cooperating with both the Second Prince and the Crown Prince. Her true choice was the Crown Prince.

The Eldest Princess worked with both the Crown Prince and the Second Prince in the drama, so she was both the Crown Prince's and the Second Prince's person.

Eldest Princess Li Yunrui was the Second Prince Li Chengze's subordinate in Joy of Life. The Eldest Princess used her beauty to seduce the Crown Prince Li Chengqian and collaborated with the Second Prince Li Chengze to plot a rebellion. There was a relationship of cooperation and competition between them. The Eldest Princess chose to cooperate with the Second Prince because the Second Prince was resourceful and inherited the Qing Emperor's power.

The Eldest Princess was neither the Crown Prince's nor the Second Prince's. She was an independent character who used her power and money to control the palace treasury. She also used the palace treasury to make fake accounts and raise private soldiers for the Second Prince. The Eldest Princess had an affair with the Crown Prince, but she ultimately chose to cooperate with the Second Prince. The Eldest Princess 'choice showed that she really supported the Second Prince.

In Joy of Life, the Second Prince and the Eldest Princess had a cooperative relationship. They conspired to plot a series of conspiracies, including using the Crown Prince's banner to do bad things, smuggling activities, and embezzling money. The Eldest Princess had an affair with the Second Prince and formed an alliance with him. However, the search results did not provide any more information about the plot and development between them. Therefore, I'm not sure about the specific plot and relationship between the Second Prince and the Eldest Princess in Joy of Life.

The Second Prince and the Eldest Princess had a certain cooperative relationship in the drama. The Eldest Princess was initially thought to be a supporter of the Crown Prince, but in fact, her real partner was the Second Prince. The Second Prince fawned over the Eldest Princess and helped her in some situations. However, the Eldest Princess was also an independent character. She was passionate about power and could change her stance at any time. She, the Crown Prince, and the Second Prince had their own plans and goals. The details of the cooperation between the Second Prince and the Eldest Princess in the plot and the development of their relationship needed to be further watched to know.

The relationship between the Eldest Princess and the Second Prince was complicated and ever-changing. In the play, the Eldest Princess was in an alliance with the Crown Prince on the surface, but secretly cooperated with the Second Prince. She used her control over the palace treasury to carry out smuggling deals with Northern Qi, buying the hearts of the Second Prince and helping him clear the channels in the court. The Eldest Princess cooperated with the Second Prince and had an affair with the Crown Prince. This complicated relationship made the eldest princess an important character in the play. Her actions and plans played a key role in the development of the plot.

According to the information provided, the Second Prince and the Eldest Princess in Joy of Life were in cahoots. On the surface, the Eldest Princess supported the Crown Prince, but in reality, she was colluding with the Second Prince. The Second Prince had swordsmanship experts Xie Bi 'an and Li Hongcheng, the son of King Jing, by his side. The Eldest Princess held the financial power of the Qing Kingdom's treasury and cooperated with the Second Prince. Their plot was eventually exposed, and the Eldest Princess committed suicide, while the Second Prince was also facing depose. Therefore, according to the information provided, the Second Prince and the Eldest Princess were in cahoots.

In Joy of Life, the Second Prince Li Chengze and the Eldest Princess Li Yunrui were in cahoots. On the surface, the Eldest Princess supported the Crown Prince, but in reality, she was colluding with the Second Prince. There was a relationship of cooperation and competition between them. The Eldest Princess used her beauty to seduce the Crown Prince Li Chengqian, and at the same time, she collaborated with the Second Prince Li Chengze to plot a rebellion. However, their scheme was eventually exposed. The Eldest Princess, Crown Prince, and Second Prince all chose to commit suicide.