Graffiti artists paint on a 217-meter-long board near an art gallery in Mexico City, Aug. 2, 2009.[Xinhua]
![Graffiti artists paint on a 217-meter-long board near an art gallery in Mexico City, Aug. 2, 2009.[Xinhua]](http://images.china.cn/attachement/jpg/site1007/20090804/000bcdb95f1d0be1dd531e.jpg "Graffiti artists paint on a 217-meter-long board near an art gallery in Mexico City, Aug. 2, 2009.[Xinhua]")