CONCH. According to the query of CONCH official website, CONCH is the top leading industry in the industry, with good quality. The company's production and sales volume ranked first in the country for 1 1 year, and Conch brand cement was approved as an inspection-free product by the General Administration of Quality Supervision, Inspection and Quarantine. CONCH belongs to Anhui CONCH Co., Ltd., which is engaged in the production and sales of cement and commercial clinker, and is the largest supplier of cement and clinker in Asia.