The chaos in the water purification market, how should consumers prevent it?

China in the 21st century is the most rapid stage of material economic improvement. During this period of time, the national economy has been upgraded unprecedentedly, and the per capita living standard has been greatly improved, and the demand for materials has increased greatly. For the water purifiers and pure water machines operated by the water purification market, the water purifiers and pure water machines operated by the company are operated by water purifiers and pure water machines...