https://creativecommons.org/publicdomain/zero/1.0/https://www.rawpixel.com/image/13991954Edit ImageSaveSaveEditCropCustom TextNankow pass, Pechili province, China. Photograph by John Thomson, 1871.Original public domain image from Wellcome CollectionMorePublic DomainFree CC0 image for Personal and Business useInfoView CC0 LicenseJPEGSmall JPEG 1200 x 922 px | 300 dpiLarge JPEG 3500 x 2689 px | 300 dpiBest Quality JPEG 4700 x 3611 px | 300 dpiFree DownloadNankow pass, Pechili province, China. Photograph by John Thomson, 1871.More