In 2002, our company's vertical shaft impact crusher was successfully developed, which ended the history of making machine-made sand by roller crusher and hammer crusher, which greatly improved the efficiency of machine-made sand production line, and laid a technical foundation for machine-made sand to occupy the dominant position in the supply of aggregate. In 2006, based on the original PCL sand making machine, VSI sand making machine was developed, which provides a higher security guarantee for machine-made sand production. Then, China's aggregate production equipment began to move towards the development path of combining mechanization with hommization. In 2008, our company’s 5X sand making machine came out. Its energy saving and environmental protection design concept won the high praise of sand and stone production enterprises and customers. Subsequently, VSI6X sand making machine was launched to the market. With the advantages of humanized concept, convenient maintenance methods and efficient production technology, it became the wisdom choice of customers.