There are several recommended novels where the male protagonist is an emperor. Some of these include Imprisoned Concubine, I Also Miss You, Prefer to be a Beloved Concubine than an Empress, and Purple Pupil Empress: Reversal of the Demonic Consort. These novels are set in ancient times and depict love stories between the male protagonist, who is an emperor, and the female lead.
The Qing Emperor's goal was to protect his power and status. He used Fan Xian and Lin Wan 'er's marriage to oppose the Eldest Princess and used this plan to control the palace treasury. Although the Qing Emperor had his own motives, Fan Xian and Lin Wan 'er truly loved each other. The Qing Emperor's plan indirectly helped them. However, the Qing Emperor was eventually killed by Wu Zhu, ending his career of scheming. To be specific, the Qing Emperor's goal was to consolidate his power and ruling position. Fan Xian and Lin Wan 'er's marriage was part of his goal.