Illegal. According to the Civil Law of People's Republic of China (PRC), any enterprise and individual must abide by national and local environmental protection laws and regulations. Whether it is a licensed factory or an unlicensed factory, it is illegal to discharge acid-base potions. Therefore, it is illegal for Huizhou unlicensed factory to discharge acid-base liquid medicine. Enterprises involved in pollution discharge must abide by environmental protection laws and regulations, obtain corresponding pollution discharge permits, environmental protection approval and other related procedures, strictly control the concentration and discharge of pollutants, and ensure that they do not cause any damage to the environment.