Workers assemble sanitation vehicles at a factory in Laoting Economic Development Area in Laoting County, north China's Hebei Province, Aug. 10, 2018. Laoting government has actively promoted economic development by introducing relocated industries from Beijing-Tianjin area. Since 2014, a total of 57 industrial projects have been transferred to Laoting County with a total investment of 25.66 billion Yuan (3.75 billion U.S. dollars). (Xinhua/Yang Shiyao)