Brown sugar is a brand, not a category. There is only one ancient brown sugar, so-and-so ancient brown sugar is fake. Gufang is the brown sugar brand of Gufang Brown Sugar Co., Ltd. in Southwest Guizhou. Gufang Brown Sugar Co., Ltd. owns the brand. Using a trademark or trade name that is the same as or similar to a registered trademark or trade name of Cuba on the same or similar goods without the authorization of Cuba's company, and taking Cuba as a common name, is an act of infringement of the exclusive right to use a registered trademark and unfair competition, and it is subject to relevant administrative, civil and criminal responsibilities.