At the confluence where the Rhine joins the Moselle in Germany's Koblenz is an unusual sight - a sunflower garden of copper. It is a collection of sunflower sculptures, each 6 to 8 meters tall.

It's the first time the German Corner, a landmark of Koblenz, has hosted an art exhibition and Chinese artist Xu Jiang has brought his show Re-Generation to the city, rebuilt from ruins after World War II.

"It's an ideal place to present my show. Both of them are coated with historical dust," says Xu, president of China Academy of Art.