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This post was last edited by hesonchang214 on 2020-3-3 at 12:36. (I) Understand one’s own water usage requirements: The ultra-pure water equipment industry is highly specialized, with significant differences in the production processes among different industries. However, the production processes for similar products within the same industry are generally similar. Before making a purchase, it is important to understand the water requirements of one’s own industry as well as the quality of the water source (tap water, groundwater, river water, well water, lake water, etc.). Water samples from the source can be sent to relevant manufacturers for quality testing, allowing for an accurate analysis of the components in the water and thus helping to determine the most suitable process system. (II) Assess the manufacturer’s qualifications and capabilities: After identifying a potential manufacturer, it is necessary to conduct a thorough evaluation of its qualifications and capabilities, including hardware facilities (factories, office environments, manufacturing equipment, business licenses) and software aspects (brand reputation, customer satisfaction, successful projects, awards and recognitions). As for how to determine a reliable manufacturer, two safe methods are to search online for those that have passed Baidu’s certification, or to get recommendations from peers.