While Plum Blossom Divination emphasizes "mindful understanding," it is by no means arbitrary. Shao Yong, in his *Huangji Jingshi*, points out that "the mind is the Taiji," meaning that only after cultivating clarity and understanding can one align with the laws of heaven and earth, not indulging in subjective speculation. The *Plum Blossom Divination* establishes the ironclad rule of "dividing the hexagram by eight and the lines by six," and all divination must operate within this mathematical framework. The first principle of divination is adherence to rules. Master Kangjie emphasizes "no divination without movement, no divination without questioning," meaning that one must rely on unusual movements of things or the matter inquired about, using established rules such as year, month, day, hour, and the number of strokes in the characters to form the hexagram. Arbitrarily choosing numbers loses the original meaning of "observing things and extracting images." The core of divination lies in the interaction of the body and function, their mutual generation and restraint. The body represents the subject, the function represents the matter, the mutual hexagram represents the process, and the changing hexagram reveals the result. The auspiciousness or inauspiciousness of generation and restraint must be considered in conjunction with the strength and weakness of the hexagram's energy: *Plum Blossom Divination* clearly indicates that spring wood is strong and autumn metal is strong; the same hexagram can have vastly different strengths and inauspiciousness at different times. Memorizing only the analogies without understanding the interplay of mutual generation and restraint, strength and weakness, is to put the cart before the horse. The prediction of the timing of events requires even greater precision. The saying "representing distant years and months, and nearby days and hours" is not an empty phrase; it requires using the hexagram as a foundation, considering mutual generation and restraint, and the solar terms. When the useful hexagram restrains the body hexagram, if it is at its peak, the timing will be swift; otherwise, it will be slow. Behind this lies the cyclical principle of the waxing and waning of Yin and Yang. The so-called "my heart as the law" refers to the "first intuition" achieved only after mastering all the rules of hexagram formation, analogies, mutual generation and restraint, and timing. It is like the butcher dissecting an ox, "seeing with the spirit rather than with the eyes," yet still following the natural laws and principles of the body's structure. Shao Yong's learning is the unity of "innate heart" and "acquired law." Without rules, there is no Yi Dao; without laws, it is difficult to reach the divine. Practitioners should always remember: only within a strictly defined framework can the true secrets of heaven be revealed.