What do some blank areas on the ground in China represent?

According to public information, the blank area of the map represents the outline range of a certain area, such as the outline map of Hebei Province. It has no detailed features, but only indicates the relationship between the positions of various regions, so it is a blank map.

The map of China refers to the map showing the territory of People's Republic of China (PRC) (China) and the distribution of various geographical elements within it. According to the general classification method of maps, China maps can be divided into administrative maps, topographic maps, natural geographical maps, human geographical maps and satellite image maps.