Advanced process design of the air separation: The whole system is designed with computerized calculation, which optimizes the calculation and components' structures. 3-D piping design and stress calculation make the whole process more reasonable and accurate. Stable performance, continuous operation: During the design, we have taken the reliability as first consideration, and try best to avoid possible failure of components or any interruption of the plant caused by possible unskilled or incorrect operation. Meanwhile, we also give first priority to stability and safety during selection of component units.