lanzhou

gansu

huge

waterwheel

draws

water

river

irrigate

farmland

tourist

landmark

china

northwest

great

yellow

provincial

capital

western

cities

tourism

promotional

videos

ancient

buildings

silk

road

white

clouds

blue

sky

lakes

attractions

fun

vacation

culture

source

lake

cart

fetching

irrigation

field

agriculture

technology

agricultural

wheel

used

fetch