On Jun. 8, the 3people delegation headed by chief expert Dr. Gao Mingwei from JKTech Technology Company (University of Queensland, Australia) came to CINF for technical exchange on open pit mining slope safety technique, grinding technique and fine grinding equipment etc. to provide the new design concepts and cases for CINF open pit mining slope safety design, beneficiation fine grinding process design and grinding equipment selection. Over 40 technical staff from mine engineering division, research institute and Huachu Machinery of CINF attended the technical exchange.