When the body is running in a healthy manner, liquid nitrogen is stored under low temperature to preserve the human cells when the function and activity of cells are not affected. After 10, 20 or even 30 years, when the level of immunity is lowered due to uncertain factors or some diseases occur, the stored healthy cells will be reactivated and then returned to the body, with a view to treating diseases and invigorating the tissues. Store our own cells, and cherish a hope for our health!