Group 1 - Jiangsu Dingtai Earthwork Building Materials Co., Ltd. has been established with a registered capital of 10 million RMB [1] - The legal representative of the company is Zhang Zhizhong [1] - The company's business scope includes road cargo transportation (excluding hazardous goods), construction materials sales, earthwork engineering construction, and various building material sales [1] Group 2 - The company is authorized to operate after obtaining necessary approvals from relevant departments for certain projects [1] - The general projects include sales of lightweight building materials, waterproofing materials, cement products, refractory materials, and various types of bricks and tiles [1] - The company can independently conduct business activities based on its business license, except for projects that require approval [1]