Forward the opinion of a coffee taster: Hainan's climatic conditions are very suitable for producing coffee beans, which are similar to those in South America and Ethiopia, but. . . The climate of the place of origin is only one factor. The management level during planting, the coffee bean treatment in the later stage is divided into cleaning, drying and baking. Hainan's coffee bean plantations are scattered, lacking large-scale modern management experience, and local people often use pesticides and fertilizers. This may lead to pollution. The management level of some manufacturers is worrying, and the quality of coffee beans fluctuates greatly. The taste of the same batch of beans from the same manufacturer may be very poor, and enterprises in Hainan are generally not good at it. Low-level management will lead to impurities in coffee, or mold during fermentation, which will affect flavor and even seriously affect health. So it is not recommended to buy Hainan coffee. If you taste it once in a while, it's ok. However, if you drink it for a long time, it is recommended to choose products refined by famous factories. Generally, large factories will mark the place of origin and the treatment methods and equipment used. If you can't find out what equipment a small local factory in Hainan uses to wash and bake coffee beans online, most of them are deliberately concealed. Moreover, some Hainan manufacturers use non-dairy products made of hydrogenated vegetable oil instead of dairy products in three-in-one instant coffee. I have visited Hainan Coffee Factory.