Staff members of Qingdao International Airport check sanitation in a capsule hotel in Qingdao, East China's Shandong province, May 17, 2016. The capsule hotel, the first of its kind in China, is located at Terminal 2 of Qingdao airport, covering over 400 square meters which offers passengers services including check-in, lodging, checkroom, shopping, library and ect.[Photo/Xinhua]