Taking photographs or videos of military installations is prohibited. Most museums, palaces, or temples will not allow photograph to be taken, notably the main pit of the Terracotta Warriors, but some institutions permit it on payment of a fee in advance.
As the atmosphere in China is often hazy, filters are advisable. Color print film is widely available, black and white or slide film much less so. Video film can be found but not always readily. All security X-ray machines on Mainland China and at Hong Kong airport are film-safe. Cameras must be declared when arriving in China. If video or movie cameras are for professional use, special permit must be claimed.