A kindergarten teacher explains the photos to kindergarten children at the 19th Pingyao International Photography Festival, on Sept 19, 2019. [Photo by Sun Ruisheng/chinadaily.com.cn]

A visitor takes a photo of a picture displayed in an exhibition at the 19th Pingyao International Photography Festival, on Sept 19, 2019. [Photo by Sun Ruisheng/chinadaily.com.cn]