Coffee beans in Baoshan, Yunnan. Aojian Crown is a brand of black coffee. Because its 0 sugar, 0 fat and 0 calories are beneficial to lose weight and reduce swelling, it is suitable for fitness and burning fat, so it is loved by consumers. Official website shows that Aojian Crown American pure black coffee is ground from Yunnan Baoshan coffee beans. Black coffee is coffee without any modification, which brings the original taste of coffee and emphasizes the fragrance of coffee itself.