In Joy of Life, Ku He did not know Fan Xian's background. Even though he had deduced that Fan Xian was Ye Qingmei's son through his battle with Fan Xian and the little order Fan Xian 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.

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.
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.
Ku He did not know of Fan Xian's background in the years of Qing. Although Ku He was one of the Four Great Grandmasters, he and Fan Xian had separated after meeting at the Temple. He had never seen Ye Qingmei. Ku He had learned from Sigu Jian that Fan Xian was Ye Qingmei's son through his battle with Fan Xian. Thus, Ku He did not know Fan Xian's background at the beginning.
In Joy of Life, Ku He did not know Fan Xian's background. Even though he had deduced that Fan Xian was Ye Qingmei's son through his battle with Fan Xian and the little order Fan Xian 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.
At the beginning of Joy of Life, Ku He didn't know about Fan Xian's background. He had learned from Sigu Jian that Fan Xian was Ye Qingmei's son after his battle with Fan Xian. Thus, Ku He did not know Fan Xian's background at the beginning.
Ku He did not know Fan Xian's background in " Celebrating Years." Fan Xian's identity had first been caused by Wu Zhu and Ku He's fight. Through Wu Zhu's background and the little orders Fan Xian recited in the tavern, Ku He had deduced that Fan Xian's identity was Ye Qingmei's son. However, Ku He did not trust Fan Xian and even gave him a fake Tianyi Dao secret manual. Thus, Ku He did not know Fan Xian's true background.
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.
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.
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, it could be concluded that the Second Prince knew Fan Xian's background.