In the process of social development, industry plays an important role, and it can lead the country to develop in a better direction. The liquid nitrogen container adopts advanced technologies such as updated high-vacuum multi-layer insulation, electronic temperature control and liquid nitrogen dispersion, and is used for long-term static storage of various samples, and also has many uses in industry. In industrial production, liquid nitrogen is obtained by fractional distillation of compressed liquid air, which can be used as a deep refrigerant. Due to its chemical inertness, it can directly contact biological tissues and freeze immediately without destroying biological activity. Therefore, it can be used for: