The China Environmental Protection Foundation in collaboration with Jody Xiong of agency DDB China, developed an outdoor campaign, to creatively promote the environmental benefits of walking versus driving. The campaign involved laying an enormous canvas on the ground, covering the pedestrian crosswalk with a large leafless tree. Placed on either side of the road beneath the traffic lights, were sponge cushions soaked in green environmentally friendly quick dry paint. As pedestrians walked towards the crossing they would make foot imprints onto the tree on the ground. Each green footprint added to the canvas like leaves growing on a bare tree.