The phrases "Qian Long Wu Yong" (hidden dragon should not act) and "Fei Long Zai Tian" (soaring dragon in the sky) both come from the image text of the first hexagram "Qian" in the Book of Changes. "Hidden dragon should not act" metaphorically refers to when things are initially developing; although there is a momentum for development, they are still relatively weak. Therefore, one should be careful and cautious, and not act rashly. On the other hand, "soaring dragon in the sky" implies a person of sage virtue obtaining the throne.