Sue Phillips. By checking the word of mouth of the two brands, we know that Yanzhong is not as good as Xuefeili, and the gas of Xuefeili salt water is more sufficient than that of Yanzhong, so more people buy Xuefeili than Yanzhong, and the word of mouth is also better than Yanzhong. Soda is a refreshing drink, which contains carbon dioxide, with the right amount of sugar, citric acid, flavor, food coloring and so on.