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 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 exact process by which the Second Prince knew Fan Xian was a Prince was not explicitly mentioned in the search results provided.
The reason the Second Prince knew Fan Xian was a prince was that when the Qing Emperor had summoned Fan Xian, the Crown Prince, and the Second Prince to eat together, the Qing Emperor had instructed the three brothers to enjoy the food before he left 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.
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, the Second Prince knew that Fan Xian was a prince through the Qing Emperor's hint and the Crown Prince's understanding.
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 already knew that Fan Xian was the Qing Emperor's son. Thus, the Second Prince knew that Fan Xian was a prince.
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 already knew that Fan Xian was the Qing Emperor's son. Thus, the Second Prince knew that 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 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. Thus, the Second Prince knew that Fan Xian was a prince.
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 already knew that Fan Xian was the Qing Emperor's son. Thus, the Second Prince knew that Fan Xian was a prince.
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 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.
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 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.
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 already knew that Fan Xian was the Qing Emperor's son. Thus, the Second Prince knew that Fan Xian was a prince.
The reason the Second Prince knew Fan Xian was a prince was that when the Qing Emperor had summoned Fan Xian, the Crown Prince, and the Second Prince to eat together, the Qing Emperor had instructed the three brothers to enjoy the food before he left 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.