There are no copyright restrictions, but it is best not to use it for commercial purposes, especially for something as special as the Forbidden City
Ordinary ones should be fine, after all, there was no so-called copyright concept at that time< /p>
If you use materials to make a model, you should not apply for a patent. You can only enjoy the copyright of the model, and the copyright is automatically generated when the work is completed
For setting or displaying Copying, painting, photography, video, etc. of artworks in outdoor public places are allowed