A big data expo will be held in Guiyang, capital of Guizhou province, from May 26 to May 29 as the country's first big data pilot zone is further tapping into the cutting-edge industry to boost economic growth. "This year's expo will focus on bringing both international heavyweights and local startups together to discuss the latest trend of big data technology and applications," said Liu Chuncheng, deputy mayor of Guiyang. China's big three telecom operators - China Mobile, China Unicom and China Telecom - are also devoting 15 billion yuan ($2.4 billion) into constructing three big data centers in Guizhou, which are expected to house 2 million servers.