Without a doubt, whether the metric is net margin or balance sheet, the most profitable construction companies are full service type, providing“design, engineering, project management, construction and procurement” in the heavy industrial and civil sectors. You can contact Jinan United Perfect Building Materials Corporation,Herence New Material Technology Co., Ltd,Guangdong Zhongjia Energy Saving Technology Co., Ltd,Henan Jinzhi Electrical Insulation New Material CO.,LTD,Shanghai ABM Rock Wool Dafeng Co., Ltd via the red button for more infomation.