According to Iqiyi's video tips, the little duke recognized Master in the seventeenth episode of "Crossing the Mountain with One Mind". The development of this plot is based on the foreshadowing of the previous plot and the accumulation of clues. In the previous plot, the little duke had doubts about the identity of the master, or had some clues to the identity of the master. In the seventeenth episode, through a series of plot expansion and plot promotion, the little duke finally determines the identity of the owner and recognizes it.