1. CONCH (China well-known trademark, national inspection-free product, Anhui Conch Group Co., Ltd.) \ xd \ xd \ 2. Dunshi Cement (China well-known trademark, national inspection-free product, Tangshan Jidong Cement Co., Ltd.) \ xd \ xd \ 3. Jianfu Cement (national cement backbone enterprise, Fujian Cement Co., Ltd. 4. huaxin cement (a century-old brand, huaxin cement Co., Ltd., top ten cement brands) \ xd \ xd \ 5. Taihang Mountain Cement (a large enterprise in building materials industry, Hebei Taihang Cement Co., Ltd.) \ xd \ xd \ 6. Qinling Cement (a national cement backbone enterprise, Qinling Cement Group, top ten cement brands) \ xd \ 7. Dinglu Cement (national key cement enterprise, national inspection-free product, Yatai Group, top ten cement brands) \ xd \ xd \ 8. Yizhou Cement (national large cement enterprise, national inspection-free product, Shandong Yizhou Cement Group Corporation) \ xd \ xd \ 9. Hongshi Cement (national large cement enterprise, national inspection-free product)