Hopstem Biotechnology (浙江霍德生物工程有限公司) is a company that produces neural stem cell products for CNS drug screening and toxicity evaluation, as well as clinical cell therapy and regeneration medicine. Its offerings include a range of human neural cells, 2D and 3D models of human nervous system diseases, neural stem cell culture, differentiation and maturation reagents, and cell line establishing services. The company also provides solutions for biomarker and drug discovery, including drug screening and neurotoxicity testing, as well as clinical trials of neural progenitor cell transplantation in ischemic stroke and brain injury.