This app includes information about this extraordinary 16th century fortress. Hailongtun was destroyed after a massive battle in 1600, and excavation work has been carried out since 1999 when trial surveys were first made of the site. The app provides information about significant parts of this ancient fortress. You can make your own list of your favourite locations. You can also take personal photos with custom picture frames using the apps camera function. Information about site exhibitions, places to eat and visitor services are also available to make your visit easier.