The principle of packaging boxes is primarily based on modular design and the concept of rapid assembly.

Firstly, the packaging boxes are designed modularly, with components such as top frames, bottom frames, corner posts, and wall panels all being pre-manufactured standard parts. These modular components can be combined or separated as needed to accommodate different space requirements.

Next, wall panels are made from lightweight materials in the packaging boxes, making the entire structure easy to handle and transport. This lightweight material not only reduces transportation costs but also enhances the reusability of the packaging boxes.

During assembly, these modular components can be quickly assembled through simple connection methods such as screws and clips. This assembly method requires no complex construction techniques and can rapidly complete the construction of packing boxes, significantly enhancing efficiency.

Additionally, the packaging boxes feature a standardized design, allowing for interchangeability between different boxes, further enhancing their flexibility and applicability.

In summary, the principle of the portable packing container is to achieve a fast, convenient, and flexible temporary construction solution through modular design, the use of lightweight materials, and rapid assembly methods. This principle makes the packing container highly applicable in scenarios such as moving, transportation, and construction sites.