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 KINZIP INTERNATIONAL CO., LIMITED,Zhejiang Zhongchao Composite New Materials Co., Ltd.,Hangzhou Tedun Building Materials Co., Ltd.,Xiamen Kingsolar New Energy Tech. Co., Ltd,Tianjin Vieworld International Trade Co., Ltd. via the red button for more infomation.