Definition of "Gansu"

This is Lanzhou, the old Silk Road outpost that has matured into a metropolis of almost 4 million as the capital of Gansu province in China’s still-poor northwest. And as your lungs can attest, it is one of the most polluted cities in the country.

2015 October 16, Matt O'Brien, “This is where China’s future will be decided.”, in The Washington Post‎, archived from the original on 16 November 2015, Wonkblog‎

A towering wall of sand rushed over factories and apartment blocks in northwestern China's Gansu province as seasonal sandstorms barrelled across the country, causing air pollution and traffic accidents.Aerial images as it struck showed an apocalyptic scene as a billowing cloud of yellow dust smothered Gansu's Linze county on Sunday.

2021 April 27, “Wall of sand engulfs Chinese town”, in France 24‎, archived from the original on 27 April 2021‎