Combo Photo shows the site of coal-to-liquid (CTL) project under construction on July 26, 2014 (above, file) and scene of the project on Dec. 26, 2016 (Xinhua/Li Ran) in northwest China's Ningxia Hui Autonomous Region. The world's biggest single coal-to-liquid (CTL) project went into production Wednesday in Ningxia. The project, undertaken by a subsidiary of the state-owned Shenhua Group, consists of homegrown technology, equipment and materials, breaking the longtime foreign monopoly in CTL core technology. (Xinhua)