Director Zhang Yan (chief physician, expert in the treatment of vulvar leukoplakia) graduated from Shanghai Second Military Medical University with a doctor's degree and has been engaged in vulvar leukoplakia and gynecology for more than ten years. He has accumulated rich clinical experience in the treatment of gynecological diseases such as vulvar malnutrition, vulvar leukoplakia atrophy, vulvar leukoplakia hyperplasia, vulvar leukoplakia lichen and vulvar leukoplakia mixed type. Can lead the way in the medical field, accurate diagnosis and treatment, rapid radical cure, no sequelae, deeply recognized and trusted by patients. He has rich clinical experience in the diagnosis and treatment of various gynecological diseases, intractable diseases and endocrine diseases. Participated in international and domestic academic seminars for many times, and handed over advanced technology to participating experts for discussion, which was appreciated and praised. Many papers were published in national and provincial magazines and newspapers.