Photographers also take photos of themselves when there are not many visitors.
Gao likes to take photos of children.
Gao has lost the email addresses left by these three customers. He has not yet been able to get in touch with them.
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Award-winning photos show poverty reduction achievements in NE China's Jilin province
People dance to greet advent of New Year in Ameiqituo Town, Guizhou
Fire brigade in Shanghai holds group wedding
Tourists enjoy ice sculptures in Datan Town, north China
Sunset scenery of Dayan Pagoda in Xi'an
Tourists have fun at scenic spot in Nanlong Town, NW China
Harbin attracts tourists by making best use of ice in winter
In pics: FIS Alpine Ski Women's World Cup Slalom
Black-necked cranes rest at reservoir in Lhunzhub County, Lhasa
China's FAST telescope will be available to foreign scientists in April
