We compared several mining manufacturers before we decided to choose which one because of the large-scale production line. There are two sides which make me feel very satisfied by using your equipment: one is that the quality of those wearing parts is very good, and the usage circle is very longer, and the second is that those technicians could solve those problems in time when there were some wrong with equipment, and there will be some professional experts being sent to us to guide and train our administrators on some basic block solving and maintenance skills.