As the core connecting part, the corner casting is made of high-strength cast steel and is located at the eight corners of the container, which can accurately connect with the crane and other equipment during loading and unloading, and firmly fix the box during transportation; The door lock device is installed on the container door and is composed of a lock rod, a lock seat and a handle. With the high-strength lock rod and anti-theft design, it ensures that the container door is closed tightly during transportation and protects the safety of goods; There is also a rubber sealing strip for sealing, which can prevent water, dust and gas leakage, ensure the stability of the environment inside the container, and all kinds of accessories perform their respective duties to support an efficient and safe logistics and transportation system for containers.