Zhang Jiayang is a Chinese book author. Publicly available information about the author is limited, and basic details such as biography, nationality, and dates of birth and death are not clearly recorded. Judging from the two works held in the collection, Pharmaceutical Administration and Regulations and Pharmaceutics, the author's writing focuses on the fields of pharmacy and pharmaceutical management, with medicine as the common category. Pharmaceutical Administration and Regulations generally deals with drug regulatory systems, laws and regulations, and industry standards, while Pharmaceutics mostly discusses the basic principles of drug preparation, dosage form design, and preparation techniques; the two correspond respectively to the institutional and technical dimensions of the pharmaceutical industry. It can therefore be inferred that Zhang Jiayang's writing tends toward a practical style suited to textbooks or professional reference works, serving the study and professional needs of those in pharmacy-related fields. Because information about the author's personal background is insufficient, further material is needed to clarify specific experiences and academic context.
