Many wanted to join the coalition but had made difficulties in choosing the project and wondered what kind of industry and project to choose. Here, it is recommended that we could consider joining water purification units. The following is a description of the benefits of opening a water purification shop: as concerns about drinking water safety and health continue to increase, the demand for water purification units is increasing. The installation of water purification units in homes, offices, schools, etc. Ensures the quality of drinking water while improving the quality of life. 2. Profit space: the brands and models of water purification units are numerous and the prices and quality vary. As a result, the choice of suitable water purification brands and models allows for higher profits through rational pricing and marketing strategies. 3. Stability of the client group: water purification units are long-term products and, once installed, users usually do not change frequently. Th...