Liu Lianwei is a Chinese author about whom limited public information is available, and details of his life remain unclear. According to available records, he has two works in the collection: Pharmaceutics and Practical Pharmaceutics, both classified under medicine. These two works center on pharmaceutics, a core branch of pharmacy, covering the basic theories, preparation techniques, and clinical applications of pharmaceutical preparations for pharmacy students and practitioners. Based on the current information, his writing appears to focus on professional textbooks and the organization of practical knowledge, with a normative and rigorous technical style suited to teaching and practical reference. Because no verifiable biographical, educational, or professional background information is available, this introduction makes no inferences about his personal experience and merely outlines, on the basis of the subject matter and classification of his works in the collection, his basic profile as a writer in the field of pharmaceutics.