Photo taken on May 25, 2017 shows a "time tunnel" at a demonstration center of Guizhou big data pilot zone in Guiyang, capital of southwest China's Guizhou Province. The demonstration center is located in Guanshanhu District of Guiyang, with a construction area of 4,300 square meters. The mountainous Guizhou Province has become a pioneer in China's big data development due to a moderate climate, sufficient power supply and good network infrastructure. (Xinhua/Liu Xu)
