A bus with an ad featuring Snub-Nosed Monkey drives in front of Mcpherson Square, in Washington D.C., capital of the United States, Sept 21, 2015. 70 metrobuses with images of six endangered animals of China: Giant Panda, Red Panda, Snub-Nosed Monkey, Tibetan Antelope, Crested Ibis and Red-Crown Crane, will travel around Northwest Washington and parts of Maryland and Virginia for five weeks since Monday. [Photo/Xinhua]