Professor, Chief Physician, and Master's Supervisor. Dr. Xiaolan Lian is an MD, Professor, and Chief Physician in the Department of Endocrinology at Peking Union Medical College Hospital. She currently serves as a member of the Endocrinology Society of the Chinese Medical Association and Deputy Leader of the Thyroid Group; Vice Chairman of the 8th and 9th Endocrinology Committee of the Beijing Branch of the Chinese Medical Association; Standing Committee Member of the Endocrinology Committee of the Gerontological Society of China; Standing Committee Member of the Chinese Anti-Aging Association; and a drug review expert for the National Medical Products Administration. She is an editorial board member for several journals, including the Chinese Journal of Endocrinology and Metabolism, Chinese Journal of Multiple Organ Dysfunction in the Elderly, Chinese Journal of Practical Internal Medicine, and Adverse Drug Reactions Journal. She is primarily engaged in clinical and basic research in endocrinology, especially in thyroid diseases. She specializes in the diagnosis and treatment of endocrine and metabolic diseases.