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The pediatrics taught by Guang Zhi emphasizes the two words "practicality," eschewing empty rhetoric. Drawing upon his own experience of over twenty years in clinical practice and seeking medical advice, he incorporates theories from various schools of thought, presenting content that is simple yet clear and comprehensive. For practical applications in clinical settings, he collects materials regardless of their depth or vulgarity, aiming for true utility for patients and targeted symptom treatment.

Observing the various diseases commonly afflicting children, it is fundamentally different from adult diseases; thus, the methods for clinical consultation naturally differ. Furthermore, children are divided into infants (breastfed babies) and older children, whose symptoms and treatments cannot be the same.

Adult diseases, although generally falling under categories such as cold, heat, deficiency, excess, dryness, dampness, food stagnation, wind-cold injury, lung diseases, and blood diseases, present a myriad of complexities that seem difficult to address. A slight error in consulting a physician can lead to significant deviations in outcome. Without careful observation, rich experience, dedicated research, and profound insight, one cannot accurately diagnose or prescribe medication. However, adults can describe the location of their illness and physical suffering. Combined with diagnostic procedures such as inspection (Wang), listening and smelling (Wen), inquiry (Wen), and palpation (Qie), the manifestation and state of the syndrome become apparent, allowing for differentiation between internal injury, external contraction, or combined internal-external pathology. Once the syndrome pattern is identified, treatment can be applied accordingly; what seems difficult is actually not so.

This contrasts sharply with pediatric cases, where children cannot identify the location of their illness nor verbally express their pain or symptoms. Due to their small stature and incomplete development of limbs and bones, they cannot tolerate potent medications. Moreover, children often refuse medicine, and slow-acting mild remedies are insufficient for conditions like convulsions (Jing Feng, an acute pediatric condition characterized by spasms and coma), which require immediate attention. Although children lack complex emotions and desires, making their illnesses seemingly simple, clinical medication management is extremely difficult and prone to error, with potentially disastrous consequences. What appears easy is actually very hard. Therefore, pediatrics stands as a separate discipline, colloquially known as the "Mute Department" (Ya Ke), because the diagnostic method of inquiry is absent alongside inspection, listening/smelling, and palpation. Consequently, one cannot discuss pediatrics without experience, nor treat pediatric diseases without ten to twenty years of experience. Techniques such as observing finger veins and pulse diagnosis serve merely as auxiliary aids.