Pedestrians walk past trees tied with yellow ribbons on a street in north China's Tianjin, on May 12, 2009. Volunteers tied thousands of yellow ribbons on buses, buildings and trees as a way to commemorate the victims of the May 12, 2008 Wenchuan earthquake. [Xinhua]

Volunteers tie yellow ribbons to handrails of a bridge in north China's Tianjin, on May 12, 2009. Volunteers tied thousands of yellow ribbons on buses, buildings and trees as a way to commemorate the victims of the May 12, 2008 Wenchuan earthquake. [Xinhua]