Group 1 - The company Pianzaihuang (600436.SH) has recently obtained a new invention patent authorization for a method to evaluate the quality of "An Gong Niu Huang Wan" based on the biological effects of STAT3 protein [2] - The patent application number is CN202210749748.6, and the authorization date is September 19, 2025 [2] - This invention has undergone methodological optimization and validation, demonstrating high accuracy and reflecting the clinical effectiveness of "An Gong Niu Huang Wan," thereby enhancing its quality control system with practical application value [2]