In international freight transportation, we will often come into contact with the container as a carrier, also known as "container". It is a large-sized loading container that can be loaded with packaging or unpacked cargo for transportation, which is a large loading container with certain strength, stiffness and specifications designed for revolving use. From the above picture, we can see that there are numbers such as box number and weight on the container. Let's interpret it together. Among them, the standard container number at the top adopts ISO6346 (1995) standard and consists of 11 bits of code. Each container number is unique. It consists of three parts, namely： The first part is composed of four English letters. The first three codes, which mainly describe the container owner and operator, are stipulated by the container owner himself and registered with the international container bureau. The fourth code specifies the type of container. The letter 'U' is usually used for a conventional container, 'J' for a container with detachable equipment, and 'Z' for a container with trailer and chassis. The second part consists of 6 digits. It is the registration code or sequence number of the box, used for the unique identification held by a container box. The third part is the verification code, which is the basis for verifying whether the records of the main code and sequence number of the box are accurate. It is calculated by the first 4 letters and 6 digits through the verification rules. There are so many containers in the general port, we need the box number to identify the storage location and information of each box. Secondly, the following value is the limit mark. Each container will clearly indicate the maximum weight of its container, that is, the weight limit of the box. For example, MAX WEIGHT XXXXKGS, TARE WEIGHT: ZZZZ KGS, PAYLOAD: SSSSKGS etc. The tolerable strength of the container is limited. If the load exceeds this limit, the cabinet may be deformed, the bottom plate will fall off, and the top beam will be damaged. All the losses will be borne by the shipper. As long as the container load exceeds the weight limit of the container, the terminal will refuse to accept the container. Therefore, it is recommended that you read the weight limit on the container box before packing to avoid unnecessary repacking.