Yi Yang began researching peptide synthesis in 2003, and obtained his doctoral degree at Bielefeld University, Germany in 2008. Dr. Yang worked for three years at Lonza AG, Visp, Switzerland as R&D and Process Peptide Chemist, participated in multi cGMP peptidyl API production at Lonza, which is regarded as one of the largest peptide contract manufacturing organization (CMO) in the world, serving pharmaceutical companies. He is currently the Senior Research Scientist of Chemical Development, Global Pharmaceutical R&D, Ferring Pharmaceuticals A/S, Copenhagen, Denmark. Dr. Yang’s experience with a wide variety of peptide side reactions, from both practical and theoretical aspects, is ideal for this publication.