On April 24, 2021, the Drug Safety Evaluation Research Center of Shandong Xinbo Pharmaceutical Research Co., Ltd. held a commemorative event for World Experimental Animal Day. The activity aims to promote the welfare and ethical concepts of experimental animals, and enhance practitioners' understanding of the "3R" principles (substitution, reduction, optimization). The participants jointly reviewed the important role of experimental animals in drug safety evaluation and held a moment of silence to express respect for experimental animals who have dedicated themselves to scientific research.