Why did Bian Que "walk away" when he met Cai Huangong and Bian Que? Answer with the original sentence of the text and talk about the function of this writing.

. "Return (xuán) to go" is the same as "spin", turn around, turn around and go. The meaning of "run" in ancient Chinese is different from that of "walk" in modern Chinese. "Looking at Huan" and "Walking away" mean looking from a distance. Bian Que saw Huan Hou at a distance, didn't speak, and quickly turned and ran away. Seeing Cai Huangong for the fourth time, why did Bian Que "walk away"? This was the turning point of the plot, which caused "suspense" to the readers in the development of the plot, which led Huan Gong to send someone to ask Bian Que and pointed out the reason for "going back". It is pointed out that Cai Huangong's illness is in the "bone marrow", while "in the bone marrow, where life belongs, there is nothing to do. Now in the bone marrow, I have no invitation. " Bian Que is powerless to save Cai Huangong's illness. Bian Que's Go Away not only supplements the above contents, but also foretells the death of Cai Huangong and the escape of Bian Que.