Why is the wine at HNA airport so expensive?

The cost of raw materials is high. According to the introduction of liquor products at HNA airport, it can be seen that liquor at HNA airport is so expensive because of the high cost of raw materials. China Liquor refers to the distilled liquor made from grain as the main raw material, Daqu, Xiaoqu or bran koji and yeast as saccharifying and fermenting agents, through cooking, saccharification, fermentation, distillation, storage and blending.