Fan Xian was a prince. In the end, everyone knew.

In the end, Fan Xian did not become Emperor. In Joy of Life, Fan Xian learned that he was the Qing Emperor's illegitimate son, but he did not become Emperor. In the end, Fan Xian joined forces with others to kill the Qing Emperor and push the Third Prince of the Qing Kingdom to the throne. Fan Xian chose to live in seclusion in the mountains and lived a peaceful life with his wife, Lin Wan 'er. Therefore, Fan Xian did not become the Emperor. Instead, he chose to live in seclusion.

In the end, Fan Xian did not become Emperor. In Joy of Life, Fan Xian learned that he was the Qing Emperor's illegitimate son, but he did not become Emperor. In the end, Fan Xian joined forces with others to kill the Qing Emperor and push the Third Prince of the Qing Kingdom to the throne. Fan Xian chose to live in seclusion in the mountains and lived a peaceful life with his wife, Lin Wan 'er. Therefore, Fan Xian did not become the Emperor. Instead, he chose to live in seclusion.

In the end, Fan Xian did not become Emperor. In Joy of Life, Fan Xian learned that he was the Qing Emperor's illegitimate son, but he did not become Emperor. In the end, Fan Xian joined forces with others to kill the Qing Emperor and push the Third Prince of the Qing Kingdom to the throne. Fan Xian chose to live in seclusion in the mountains and lived a peaceful life with his wife, Lin Wan 'er. Therefore, Fan Xian did not become the Emperor. Instead, he chose to live in seclusion.

Yes, in Joy of Life, the Crown Prince knew that Fan Xian was a prince. In chapter 239 of the novel, the Qing Emperor asked Fan Xian and the Crown Prince to meet Lin Ruofu. In their conversation, the Crown Prince unintentionally revealed the truth that Fan Xian was a Prince.

The Second Prince knew that Fan Xian was a prince. In Joy of Life, the Qing Emperor once told the three brothers to enjoy the delicacies and hinted at Fan Xian's identity. Although Fan Xian had not understood the meaning behind it at the time, the Crown Prince and Second Prince already knew that Fan Xian was a Prince. Thus, it could be concluded that the Second Prince knew Fan Xian was a Prince.

The Second Prince knew that Fan Xian was a prince. During one meal, the Qing Emperor instructed the three brothers to enjoy the delicacies and hinted at Fan Xian's identity. Although the specific details had not been mentioned, 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.

When the Qing Emperor had gathered Fan Xian, the Crown Prince, and the Second Prince for a meal, the Second Prince had already known that Fan Xian was a Prince through the Qing Emperor's instructions and hints. The exact time was not mentioned.

The reason the Second Prince knew Fan Xian was a Prince was 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 had already understood the Qing Emperor's meaning. Thus, it was certain that the Second Prince knew Fan Xian was a Prince.

The reason the Second Prince knew Fan Xian was a prince was that during a meal, 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 behind it at the time, the Crown Prince and Second Prince already knew of Fan Xian's past. Thus, the Second Prince knew that Fan Xian was a prince.

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 the specific details had not been mentioned, the Crown Prince and Second Prince already knew that Fan Xian was the Qing Emperor's son.