In Joy of Life, the Princess Royal chose Prime Minister Lin for many reasons. First, the Eldest Princess had a crush on her brother, the Qing Emperor, and not Minister Lin. She hoped to receive the Qing Emperor's attention and love, but the Qing Emperor fell in love with Ye Qingmei. In order to attract the Qing Emperor's regret and attention, the Eldest Princess chose to have an illegitimate daughter, Lin Wan 'er, with Lin Xiang. Secondly, the Eldest Princess had no real feelings for Minister Lin. She valued Minister Lin's status and power more. She chose to marry Lin to win over his heart and gain more power, not out of love. In addition, the Eldest Princess did not like Fan Xian to be her son-in-law because Fan Xian's marriage to Lin Wan 'er would give him the power to control the palace treasury. Thus, the Eldest Princess was hostile to Fan Xian and hoped to put him to death. In general, the Eldest Princess chose to be with Minister Lin out of consideration for power and personal interests, not true love.

In Joy of Life, the relationship between the Eldest Princess and Prime Minister Lin was an affair. They had an affair and gave birth to a daughter, Lin Wan 'er. Although they weren't officially married, they were still Lin Wan 'er's parents. In order to attract the Qing Emperor's attention, the Eldest Princess helped Minister Lin rise, and Minister Lin helped the Eldest Princess gain power. Their relationship had both personal feelings and power entanglements.
In Joy of Life, the relationship between the Eldest Princess and Prime Minister Lin was an affair. They had an affair and gave birth to a daughter, Lin Wan 'er. Although they weren't officially married, they were still Lin Wan 'er's parents. In order to attract the Qing Emperor's attention, the Eldest Princess helped Minister Lin rise, and Minister Lin helped the Eldest Princess gain power. Their relationship had both personal feelings and power entanglements.
In Joy of Life, Minister Lin and the Eldest Princess had an affair and gave birth to a daughter, Lin Wan 'er. Although they weren't officially married, they were still Lin Wan 'er's parents. In order to attract the Qing Emperor's attention, the Eldest Princess helped Minister Lin rise, and Minister Lin helped the Eldest Princess gain power. The relationship between them was an affair, but the specific plot and development needed to be understood by watching Joy of Life.
In Joy of Life, the relationship between Prime Minister Lin and the Eldest Princess was an affair. The Eldest Princess had an affair with Minister Lin and had given birth to a daughter, Lin Wan 'er. Although the Eldest Princess and Minister Lin were not officially married, they were still Lin Wan 'er's parents. In order to attract the Qing Emperor's attention, the Eldest Princess helped Minister Lin rise, and Minister Lin helped the Eldest Princess gain power. Their relationship was mutually beneficial.
In Joy of Life, the relationship between the Eldest Princess and Prime Minister Lin was an affair. They had an affair and gave birth to a daughter, Lin Wan 'er. Although they weren't officially married, they were still Lin Wan 'er's parents. In order to attract the Qing Emperor's attention, the Eldest Princess helped Minister Lin rise, and Minister Lin helped the Eldest Princess gain power. The relationship between them was personal. Please refer to the relevant documents for details.
In Joy of Life, the Eldest Princess Li Yunrui and the Prime Minister of Qing Kingdom, Lin Ruofu, had an affair. Although they were not officially married, the Eldest Princess chose to give birth to Lin Wan 'er before marriage and expressed her deep feelings for her. The Eldest Princess had supported Lin Ruofu and helped him become the Prime Minister. Their relationship had both personal feelings and power entanglements.
The relationship between the Eldest Princess Li Yunrui and Prime Minister Lin Ruofu was complicated and controversial. They weren't officially married, but they had a daughter, Lin Wan 'er. The Eldest Princess used Lin Ruofu's power to expand her influence in the court. In the end, Lin Ruofu chose to support Fan Xian to avoid the Eldest Princess 'use and to ensure his future. Therefore, the relationship between the Eldest Princess and Lin Ruofu was more about mutual use and power, rather than a true love story. As for why they did not officially marry, the literature did not provide a clear answer.
In Joy of Life, the Eldest Princess Li Yunrui and the Prime Minister of Qing Kingdom, Lin Ruofu, had an affair and gave birth to a daughter, Lin Wan 'er. Even though they were not officially married, the Eldest Princess supported Lin Ruofu and helped him become the Prime Minister. Their relationship had both personal feelings and power entanglements. The Eldest Princess had a deep love for Lin Wan 'er, even though her situation in the palace was very difficult. Lin Wan 'er was the illegitimate daughter of Prime Minister Lin Ruofu and Eldest Princess Li Yunrui.
In Joy of Life, the Eldest Princess Li Yunrui and the Prime Minister of Qing Kingdom, Lin Ruofu, had an affair. Although they were not officially married, the Eldest Princess chose to give birth to Lin Wan 'er before marriage and expressed her deep feelings for her. The Eldest Princess had supported Lin Ruofu and helped him become the Prime Minister. Their relationship had both personal feelings and power entanglements. The Eldest Princess had a deep love for Lin Wan 'er, even though her situation in the palace was very difficult. Lin Wan 'er was the illegitimate daughter of Prime Minister Lin Ruofu and Eldest Princess Li Yunrui. Their relationship had both love and power.
During the Qing years, the Eldest Princess Li Yunrui and the Qing Prime Minister Lin Ruofu had an affair. Although they were not officially married, the Eldest Princess chose to give birth to Lin Wan 'er before marriage and expressed her deep feelings for her. The Eldest Princess had supported Lin Ruofu and helped him become the Prime Minister. Their relationship had both personal feelings and power entanglements. The Eldest Princess had special feelings for Lin Wan 'er. She took her in as an adopted daughter and made her Princess Chen, Fan Xian's wife. The relationship between them was complicated and confusing. The specific details and reasons needed to be understood by watching the series of "Celebrating Years".