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Commentary states: The discipline of regulating infants is the most difficult task in the world. Moreover, records from ancient to modern times have not detailed its discussions. Although there are capable individuals in the world who have not abandoned this profession, it belongs to the art of Fangmai (diagnosing via pulse and prescribing). However, to comprehend the profound principles, there is no other subtle way than what is called "Shen, Cha, Jiu, Xiang, An, Kao, Tui, Bei" (Examine, Observe, Investigate, Detail, Press, Evaluate, Deduce, Prepare).

If one has thoroughly examined and carefully evaluated, it will not be in vain; but if one acts blindly and hastily in emergencies, arbitrarily administering remedies, errors and chaos will ensue. Alas! "Shen" (Examine) means carefully aligning with the exterior and interior relationships; "Cha" (Observe) means discerning the reality of Yin and Yang; "Jiu" (Investigate) means thoroughly exploring the Zang-Fu organs; "Xiang" (Detail) means comprehensively understanding the root and branch aspects; "An" (Press) means palpating to clarify deficiency and excess; "Kao" (Evaluate) means comparing the severity of the condition; "Tui" (Deduce) means assessing changes before and after; "Bei" (Prepare) means being fully prepared for precision. With these eight methods, one aims for perfection to preserve life, speaking no empty words, thinking no frivolous thoughts, investigating pulses without falsity, and administering medicines without waste.

For any infant, observation of complexion is primary, listening to sounds is secondary, and taking the pulse is tertiary. This is because the prenatal Qi received by infants is not yet full; their complexion is pale, their form is withered, their Qi is timid, and their voice is turbid. If their Cranfontanelle (Luo-Xin, referring to the fontanelle on the top of the head) is solid and firm, and as they grow slightly older, they can withstand Bianzheng (physiological developmental changes in infants), then even if Bianzheng is incomplete, their body may be withered and not strong, their temperament unrelaxed, but diseases will not be particularly severe. Conversely, newborns whose prenatal Qi is sufficient have a purplish-red complexion, a tight form, robust Qi, and clear voices. If their Cranfontanelle is open and loose, and as they grow, they gradually undergo Bianzheng until it is complete, their body becomes solid, form strong, temperament relaxed, and diseases over years will not be critical.

Therefore, physicians must sincerely uphold their profession, avoiding wandering aimlessly, excessive drinking, arrogance, or stubbornness. When applying methods, one must be focused (not superficial); when dispensing treatment, one must be steady (eliminating doubt); when executing, one must adapt to circumstances (acting with flexibility); when facing deceit, one must adhere to principles (following immutable laws). Intentions should not be excessive, and nature should not fall short (one must investigate thoroughly, avoiding both excess and deficiency).

Whenever encountering critical or urgent cases that evoke sorrow upon first sight, do not conform to public opinion and speak loosely; instead, judge clearly according to the aforementioned eight methods. If observation is routine while listening is dismissed as false, if attention to sight and hearing is undivided leading to chaos, if deficiency is treated as excess, cold as heat, exterior as interior, and stagnation as patency, how can one avoid negligence and error? Thus, I present the essentials: one must be cautious and deliberate in analysis, which constitutes the skill of a competent daily practitioner.