A visitor looks at the image shown at the Royal Photographic Society's 158th International Print Exhibition at the Old Truman Brewery in London, Britain on Oct. 8, 2015. (Xinhua/Han Yan)

Italian photographer Laura Visigalli poses with her photo at the Royal Photographic Society's 158th International Print Exhibition at the Old Truman Brewery in London, Britain on Oct. 8, 2015. (Xinhua/Han Yan)

Two visitors talk on the Royal Photographic Society's 158th International Print Exhibition at the Old Truman Brewery in London, Britain on Oct. 8, 2015.(Xinhua/Han Yan)

A visitor passes by the images shown at the Royal Photographic Society's 158th International Print Exhibition at the Old Truman Brewery in London, Britain on Oct. 8, 2015. (Xinhua/Han Yan)