Many people are worried about whether the container houses are illegally built and the urban management and property management will not care. This website consulted relevant personnel and found some answers from the Internet. Whether containers are illegal construction depends on what purpose they are used for and where they are placed. Houses built with containers and construction activities for production, living, business and other activities must go through planning approval procedures. Units or individuals shall construct the above-mentioned new buildings within the scope of land (or temporary land) that has obtained state-owned land use rights. In other words, if a container house is used as a business place, such as a roadside store or supermarket, land must be obtained. Just use the procedure.

What is illegal construction
"Illegal construction" is the abbreviation of illegal construction. To define a building as illegal construction, it must meet two conditions: first, it is a building; second, it is built privately in violation of regulations and without approval procedures. A container house is just a movable house, not a building. It does not meet the above conditions, so it is not an illegal construction. However, if the location of the containers used for warehouses occupies public open space, affects the beauty of the surrounding environment, or affects the lives of nearby people, the urban management will take care of it and require them to move out.
If it is not approved by the property or other management department, it is still illegal.
Others said that the land in their village would be taken back by the state, and if they had their own houses on the land, the compensation would be higher. So they want to use containers to build houses on the ground. People who have this idea are naive, and the relevant government departments are also fools. They will think that your container house is illegally built and will not give you more compensation. If you have a certain background relationship, you may get more compensation, which is considered "extortion of money".