YOCON GMP grade vitrified cell cryopreservation medium uses "YCRYO Vitrification" vitrification cryopreservation technology. The cryopreservation medium is solidified at ultra-low temperature. The formed glassy solid preserves the normal distribution of molecules and ions in liquid state. The volume can be reduced due to dehydration. After being put into liquid nitrogen, the cells are instantly vitrified and stored without the formation of ice crystals. Without cryoprotectants such as DMSO and protein, the cells can be prevented from being pierced by ice crystals, and high viability is achieved during resuscitation.