Preclinical evaluation of drugs is one of the businesses of NG28. In order to ensure the safety and effectiveness of drugs and clarify the absorption, distribution, metabolism and excretion of drugs in organisms, animal tests should be conducted before the launch of new drugs. We strictly abide by the territorial guidelines for the management and use of experimental animals, care for and respect experimental animals, manage animals in a humane way and ensure animal welfare. We continue to develop and implement new technologies, committed to the "3R" principles of animal experimentation: Reduction, Replacement and Refinement.