Fan Xian entered the palace to return the key.

Fan Xian was not discovered when he returned the key to the palace. He successfully stole the key and left the Empress Dowager's bedroom without arousing any suspicion. Fan Xian also made a fake key and put it back in its original position to avoid being discovered by the empress dowager. Thus, Fan Xian was not discovered in the process of returning the key.

Fan Xian entered the Palace to see the Qing Emperor and explain the truth and purpose of his fake death. The Qing Emperor trusted Fan Xian, so he allowed him to enter the Palace. After Fan Xian entered the Palace, he first went to pay his respects to Yi Guipin. She was Lady Liu's sister and the Third Prince's mother. After that, Fan Xian went to visit Lady Shu. She was the Second Prince's mother and loved reading. Fan Xian's goal in entering the palace was to rescue the hostages imprisoned in Baoyue Brothel and expose the Second Prince and Eldest Princess 'collusion with Northern Qi. The order in which Fan Xian entered the palace was determined by the position and status of the concubines.

The reason Fan Xian entered the Palace was because the Qing Emperor wanted to see his son. The Qing Emperor had secretly observed Fan Xian twice. The first time he had peeked at Fan Xian, he had appeared nervous because he didn't know how to face Fan Xian. After all, they had never met. When Fan Xian entered the Palace, the eunuch beside the Qing Emperor took him to meet the various consorts, including Yi Guipin, Noble Consort Shu, and Lady Ning. After entering the Palace, Fan Xian had some interaction with these concubines. Fan Xian's purpose for entering the palace and the subsequent developments were not clearly stated in the information provided.

Fan Xian entered the palace to attend the banquet in the 32nd episode of " Celebrating the Years." He and Liu Ruyu entered the palace together to meet the concubines in the rear palace, including Yi Guipin and Noble Consort Shu. The story of entering the palace showed the gradual change in Fan Xian and Liu Ruyu's relationship. When Fan Xian first entered the Palace, Liu Ruyu had been hostile toward him, worried that he would fight for the family property. But as the plot developed, Liu Ruyu's attitude toward Fan Xian gradually changed. The Qing Emperor had secretly observed Fan Xian twice when he entered the Palace. This was because Fan Xian was the son of the Qing Emperor and Ye Qingmei. Fan Xian entering the palace to attend a banquet was one of the important turning points in the plot of " Celebrating Years."

The scene of Fan Xian entering the palace to attend a banquet took place in the 32nd episode of " Celebrating Years." He and Liu Ruyu entered the palace together to meet the concubines in the rear palace, including Yi Guipin and Noble Consort Shu. The process of entering the Palace showed the change in Fan Xian and Liu Ruyu's relationship. When Fan Xian first entered the Palace, Liu Ruyu was hostile toward him and worried that he would fight for the family property. However, as the plot developed, Liu Ruyu's attitude toward Fan Xian gradually changed. As for the specific purpose and process of entering the palace, the current search results did not provide any detailed information.

Fan Xian entered the palace to eat in the 19th episode of " Celebrating Years." The Qing Emperor invited Fan Xian and the two princes to eat together. This scene had a deeper meaning. The Qing Emperor used this opportunity to test the attitudes of Fan Xian and the two princes. He hoped that Fan Xian would accept the mission to Northern Qi and eliminate the dissatisfaction and suspicion of the officials toward Fan Xian. Fan Xian's aunt, Liu Ruyu, also brought him into the palace for a meal. Their relationship gradually reconciled and became as close as mother and son. The Qing Emperor paid special attention to Fan Xian and paid close attention to his every move.

The scene of Fan Xian entering the palace for a banquet took place in the 32nd episode of " Celebrating the Years." He and Liu Ruyu entered the palace together to meet the concubines in the rear palace, including Yi Guipin and Noble Consort Shu. The process of entering the Palace showed the change in Fan Xian and Liu Ruyu's relationship. When Fan Xian first entered the Palace, Liu Ruyu was hostile toward him and worried that he would fight for the family property. The Qing Emperor also paid special attention to Fan Xian and even secretly observed him from behind. After entering the Palace, Fan Xian also attended the banquet and wrote 300 poems in public. His name shook Jingdou. The scene of the banquet at the palace showed Fan Xian's growth and the changes in his relationship with the other characters.

Fan Xian entering the palace to eat was an important scene in " Celebrating Years." It had a profound meaning. The Qing Emperor's purpose of inviting Fan Xian to dinner was to test his attitude and arrange his future tasks. The Qing Emperor paid special attention to Fan Xian and paid close attention to his every move. Through this opportunity, the Qing Emperor hoped that Fan Xian would accept the mission to Northern Qi and eliminate the dissatisfaction and suspicion of the officials toward Fan Xian. Fan Xian displayed his intelligence and wit during the meal. In addition, Fan Xian was eating in the live broadcast, stunning the female fans. In short, Fan Xian entering the palace to eat was an important part of the plot. It showed the Qing Emperor's attention to Fan Xian and his intelligence.

Fan Xian and his aunt entered the palace in the 24th episode of " Celebrating the Years." Fan Xian's aunt was Liu Ruyu. She was Fan Jian's concubine and Fan Sizhe's mother. At first, Liu Ruyu was hostile to Fan Xian, but as the plot developed, she and Fan Xian gradually reconciled and became as close as mother and son. The specific purpose of entering the Palace and background information were not mentioned, but Fan Xian and his aunt entered the Palace together and paid their respects to Yi Guipin and Noble Consort Shu. Yi Guipin was Aunt Liu's sister, and Noble Consort Shu was the Second Prince's biological mother. The purpose of entering the palace was probably to meet the concubines in the harem and show respect and courtesy.

Fan Xian and Liu Ruyu had entered the Palace to pay their respects to the concubines in the rear palace. They entered the palace together and paid their respects to Yi Guipin and Noble Consort Shu. Yi Guipin was Liu Ruyu's sister, while Noble Consort Shu was the Second Prince's biological mother. The purpose of entering the palace was probably to meet the concubines in the harem and show respect and courtesy. The specific reason and background information were not mentioned.