Dr. Chang (DVM), now is a professor of Department of Veterinary Medicine, National Chiayi University, Taiwan. He got his B Sc (B.V.M.) in veterinary medicine, M Sc in zoology, specialist in reproductive endocrinology, Ph.D. at National Chung-Hsing University (Taiwan). Currently, Dr. Chang’s researches focus on the molecular regulation of endocrine pharmacology in type 2 diabetes and oncology pharmacology in hepatic carcinoma. He tries to find the efficient drugs to overcome type 2 diabetes and hepatic fibrosis. In addition, he analyzes the residues of pesticides, veterinary drugs, and environmental toxicants in animal matrixes, especially in marine products. He uses LC/MS-MS or GC/MS-MS to detect the trace residues which may affect human healthy, including animal drugs, pesticides, and heavy metals. He pays attention to food safety.