Photo: Cleaning staff at train station in Chengdu (犀浦地铁站), by Kristoffer Trolle

Cleaning staff at train station in Chengdu (犀浦地铁站), by Kristoffer Trolle (CC BY 2.0)

source https://chinadigitaltimes.net/2021/01/photo-cleaning-staff-at-train-station-in-chengdu-%e7%8a%80%e6%b5%a6%e5%9c%b0%e9%93%81%e7%ab%99-by-kristoffer-trolle/