Fan Xian did not have a clear answer to the question of red bean rice in the first few chapters of the novel " Joy of Life." However, according to the contents of documents [2] and [6], it was not until a long time later that Fan Xian learned that Red Bean Rice was his daughter. Therefore, Fan Xian did not mention the details of how he knew that Red Bean Rice was his daughter.

Fan Xian first learned about red bean rice in the novel " Celebrating Years " in the sixth volume of the story.
The first time Fan Xian learned about red bean rice was in the second part of the sixth volume of the novel Joy of Life.
The first time Fan Xian learned about red bean rice was in the second part of the sixth volume of the novel Joy of Life.
Fan Xian and Red Bean Rice met in the second part of the sixth volume of Joy of Life.
The first time Fan Xian learned about red bean rice was in the second part of the sixth volume of the novel Joy of Life.
The first time Fan Xian learned about red bean rice was in the second part of the sixth volume of the novel Joy of Life.
The first time Fan Xian learned about red bean rice was in the second part of the sixth volume of the novel Joy of Life. The specific chapter did not explicitly mention it.
The first time Fan Xian learned about red bean rice was in the second part of the sixth volume of the novel Joy of Life.
It was only after a long time in the novel Joy of Life that Fan Xian learned that Red Bean Rice was his daughter. The specific chapter information was not mentioned.
Fan Xian first learned about red bean rice in the novel Joy of Life in the second part of the sixth volume. The specific chapter did not explicitly mention it.