According to a query on Jingdong's official website, Jingdong Cold Chain is not liquid nitrogen, but a low-temperature logistics technology used for refrigerating and transporting food, biological products and other items. Jingdong Cold Chain ensures temperature control and quality assurance of items during transportation mainly through the use of low-temperature insulation equipment and logistics technology. Liquid nitrogen is a very low-temperature liquid, which is usually used for low-temperature preservation and transportation in laboratories, medical treatment and other fields. The boiling point of liquid nitrogen is about -196°C, which can freeze items to extremely low temperature in a short time.
Beijingdong Cold Chain and liquid nitrogen are both cryogenic technologies, but with different applications and purposes. Jingdong Cold Chain is mainly used for the cold storage and transportation of food, biological products and other items, while liquid nitrogen is mainly used for cryopreservation and transportation in laboratories, medical treatment and other fields.