Historical buildings and sites, historical blocks, buildings, urban and natural landscapes, historical and cultural traditions. Inquire about the protection standards of urban historical and cultural heritage, in which the basic elements include historical buildings and sites, historical blocks, buildings, urban and natural landscapes, historical and cultural traditions, etc. Urban heritage refers to the historical and cultural heritage built in a city, that is, historical blocks, historical environments and historical buildings with traditional and local characteristics that can reflect the historical, scientific and artistic values of a city.