The reason the Second Prince knew Fan Xian knew the truth was because when the Qing Emperor had gathered Fan Xian, the Crown Prince, and the Second Prince for a meal, before he left, 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 knew the truth.

The reason the Second Prince knew Fan Xian knew the truth was because when the Qing Emperor had gathered Fan Xian, the Crown Prince, and the Second Prince for a meal, before he left, 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 knew the truth.
The reason the Second Prince knew Fan Xian knew the truth was because when the Qing Emperor had gathered Fan Xian, the Crown Prince, and the Second Prince for a meal, before he left, the Qing Emperor had 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.
The reason the Second Prince knew Fan Xian knew the truth was because when the Qing Emperor had gathered Fan Xian, the Crown Prince, and the Second Prince for a meal, before he left, 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 knew the truth.
The reason the Second Prince knew Fan Xian knew the truth was because when the Qing Emperor had gathered Fan Xian, the Crown Prince, and the Second Prince for a meal, before he left, the Qing Emperor had 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.
The reason the Second Prince knew Fan Xian knew the truth was because when the Qing Emperor had gathered Fan Xian, the Crown Prince, and the Second Prince for a meal, before he left, the Qing Emperor had 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.
The reason the Second Prince knew Fan Xian knew the truth was because when the Qing Emperor had gathered Fan Xian, the Crown Prince, and the Second Prince for a meal, before he left, 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 knew the truth.
The reason the Second Prince knew Fan Xian knew the truth was because when the Qing Emperor had gathered Fan Xian, the Crown Prince, and the Second Prince for a meal, before he left, the Qing Emperor had 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.
The reason the Second Prince knew Fan Xian knew the truth was because when the Qing Emperor had gathered Fan Xian, the Crown Prince, and the Second Prince for a meal, before he left, the Qing Emperor had 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.
Fan Xian knew the truth in the eleventh episode of Joy of Life.
Fan Xian knew the truth in the eleventh episode of Joy of Life.