In the novel, Fan Xian knew his own background.

In the early days of the novel Joy of Life, Fan Xian learned about his own life through a series of plot developments and events. The first time he suspected his identity was when he saw the letter his mother left him. Later, he saw his mother's portrait in the palace and so on, further confirming his identity as a prince. Thus, Fan Xian learned of his origins early in the novel.

In the novel " Joy of Life," Fan Xian first suspected his identity when he saw the letter his mother had left him. Then, he saw his mother's portrait in the palace and further confirmed his identity as a prince. Thus, Fan Xian learned of his origins early in the novel.

In the novel " Joy of Life," Fan Xian began to doubt his own identity when he saw the letter his mother, Ye Qingmei, left for him. Later, through seeing his mother's portrait in the Palace and other clues, Fan Xian became more and more certain of his identity as a prince. In addition, Fan Xian began to suspect his identity through the conversation with Fei Jie and the hints in the way he addressed him. Although the original work did not clearly state when Fan Xian knew he was a prince, through the clues such as Fan Xian seeing his mother's portrait at the residence where the Qing Emperor often walked and the box key Wu Zhu gave him in the Empress Dowager's Palace, Fan Xian knew that his past had many connections with the Royal Palace. It was not difficult to guess his past.

Fan Xian had learned of his origins early on in the novel Joy of Life. The first time he suspected his identity was when he saw the letter his mother left him. Later, he saw his mother's portrait in the palace and so on, further confirming his identity as a prince. Thus, Fan Xian learned of his origins early in the novel.

In the early days of the novel Joy of Life, Fan Xian learned about his own life through a series of plot developments and events. The first time he suspected his identity was when he saw the letter his mother left him. Later, he saw his mother's portrait in the palace and so on, further confirming his identity as a prince. Thus, Fan Xian learned of his origins early in the novel.

The Second Prince knew that Fan Xian was a prince. When the Qing Emperor summoned Fan Xian, the Crown Prince, and the Second Prince to eat together, before he left, the Qing Emperor instructed the three brothers to enjoy the food and hinted at Fan Xian's identity. Although Fan Xian had not understood the meaning at the time, the Crown Prince and Second Prince had already understood the Qing Emperor's meaning.

Ku He did not know Fan Xian's background in " Celebrating Years." Although Ku He had deduced that Fan Xian was Ye Qingmei's son through his battle with Fan Xian and the little order he had recited in the tavern, he did not trust Fan Xian and had even given him a fake Tianyi Dao secret manual. Thus, Ku He did not know Fan Xian's true background.

In Joy of Life, Ku He did not know Fan Xian's background. Although Ku He had deduced that Fan Xian was Ye Qingmei's son through his battle with Fan Xian and the little order he had recited in the tavern, he did not trust Fan Xian and had even given him a fake Tianyi Dao secret manual. Thus, Ku He did not know Fan Xian's true background.

The Second Prince knew about Fan Xian's background because when the Qing Emperor had summoned Fan Xian, the Crown Prince, and the Second Prince to dine together, before he left, the Qing Emperor had instructed the three brothers to enjoy the delicacies and hinted at Fan Xian's identity. Although Fan Xian had not understood the meaning at the time, the Crown Prince and Second Prince already knew that Fan Xian was the Qing Emperor's son. Thus, the Second Prince knew that Fan Xian was a prince.

In Joy of Life, Ku He did not know Fan Xian's background. Even though Ku He had learned from Sigu Jian that Fan Xian was Ye Qingmei's son after his battle with Fan Xian, Ku He had not known Fan Xian's background from the start.