Sun Jianhua, Chief Physician With over 30 years of clinical, teaching, and research experience in pediatric internal medicine and neonatology/NICU, Dr. Sun has extensive expertise in perinatal medicine, critical neonatal care, and systematic management of preterm infants. Current positions include: Member of the Chinese Medical Association's Perinatal Medicine Branch; Former Chair of the Shanghai Medical Association's Perinatal Medicine Branch; Member of the Chinese Medical Association's Pediatric Medicine Branch Neonatology Group; Vice Chair of the Shanghai Medical Association's Pediatric Medicine Branch Neonatology Group; Council Member of the Shanghai Medical Association; Standing Committee Member of the Chinese Medical Doctor Association's Neonatology Branch, and Director of its Neonatal Circulation Committee; Standing Committee Member of the Neonatology Professional Committee of the Cross-Straits Medicine and Health Exchange Association, and Director of its Neonatal Circulation Committee; Clinical Medicine Professional Degree Teaching Evaluation Expert of the Ministry of Education's Degree and Graduate Education Development Center; Member of the Teaching Committee of the Pediatric Academy of Shanghai Jiao Tong University School of Medicine, among others. Editorial board member of the Chinese Journal of Neonatology, Chinese Journal of Contemporary Pediatrics, and Journal of Clinical Pediatrics.