Smart eco-park to help residents breathe easier
Workers from China Railway No 4 Engineering Group pour concrete to build the bottom layer of Fenghe Ecological Sports Park in Qingdao, Shandong province. ZHANG SONG/FOR CHINA DAILY Lei Peng, an engineer from State-owned China Railway No 4 Engineering Group Co Ltd, is somewhat uneasy at times while building an ecological park that is only…









