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. There are many advantages in opening a water purification shop. First, water purification is a market in which demand is enormous, where demand for water quality is increasing and demand for water purification is increasing. Second, while competition in the water purification industry is intense, market shares can be obtained as long as quality products and services are available. In addition, there is a large margin of profit in the water purification industry, with high returns as long as there is a stable customer base. Finally, the operating costs of water purification shops are relatively low and do not require large stocks and sites, and therefore the operating risks are relatively low. It is important to note that the water purification industry also has a ...