abstract
adventure
background
basin
blue
china
corridor
deflation
deposit
desert
desertification
dry
dune
earth
environment
erosion
geology
ground
hillock
land
landform
landscape
mound
natural
nature
outdoor
pattern
physiognomy
qinghai
ridge
sand
scenic
shallow
sky
slope
soil
terrain
texture
tourism
travel
valley
weather
west
wilderness
wind