high-speed railway in China  中国高速铁路

railway in China  中国铁路

railway networks in Southwest China  西南铁路网

Arid area in Northwest China  西北干旱区

arid areas in Northwest China  西北干旱区; 西北干旱地区

Arid region in Northwest China  西北干旱区

climate in Northwest China  西北气候

desert grass in Northwest China  中国西北荒漠牧草

different places in northwest China  西北不同产地

drought in Northwest China  西北干旱

drylands in northwest China  降水

ecologically fragile regions in Northwest China  西北生态脆弱区

five capitals in northwest China  西北五省会

in northwest China  西北地区

inland basins in Northwest China  西北内流盆地

Medical Journal of National Defending Forces in Northwest China  西北国防医学杂志

pasturing area in Northwest China  西北牧区

rural region in northwest China  水资源

spring wheat area in northwest China  西北春麦区