1. Image source: The images of Hong Kong Gallery 49 mainly come from 49 hospitals and medical institutions in Hong Kong. These photos are usually taken with the consent of patients for teaching or research purposes. The picture sources of Hong Kong galleries are more extensive, which may include various scenes, buildings, people and historical events in Hong Kong.
2. Picture type and theme: Hong Kong Gallery 49 mainly focuses on medical and health topics, including various diseases, surgical procedures and medical equipment. Hong Kong galleries cover a wider range of topics, including social events, historical moments, people and so on.