Cultural and creative products sent by other units belong to the category of free trade import and export, and need to be declared and approved in accordance with the import and export management regulations. This may involve customs import and export procedures, tax management and other related laws and regulations.
If the cultural and creative products sent by other units involve intellectual property, such as cultural and creative works, trademarks, patents, etc. They need to abide by laws and regulations related to intellectual property rights. The receiving unit may need to confirm that the received creative products comply with the provisions of intellectual property rights and avoid legal problems such as infringement.
In addition, it is necessary to consider whether there are other relevant laws and regulations that restrict or prohibit cultural and creative products. For example, some regions or periods may prohibit the import or use of certain types of cultural and creative products.
Therefore, whether it is legal or not needs to be evaluated according to the specific situation and relevant laws and regulations. I suggest you consult a professional lawyer or relevant department to get a more specific and accurate answer.