The liquid nitrogen on JD.com is real. According to relevant public information, the liquid nitrogen sold on JD.com is the same as what is sold in hospitals, and both are genuine. If it is inconvenient for consumers to purchase offline, they can go to the online JD.com platform to purchase. If they are worried, they can go to offline stores to purchase. Liquid nitrogen refers to liquid nitrogen. Liquid nitrogen is an inert, colorless, odorless, non-corrosive, non-flammable, extremely low-temperature liquid. When it vaporizes, it will absorb a lot of heat and cause frostbite on contact. Under normal pressure, the boiling point of nitrogen is -196.56°C, and 1 cubic meter of liquid nitrogen can expand to 696 cubic meters of pure gaseous nitrogen (21°C). If pressurized, liquid nitrogen can be obtained at higher temperatures.