Longzhong Brand and Kongming Cai are authentic. Longzhong Brand and Kongming Cai are Xiangyang's longest-established brands of dashi, which adopt the most authentic practices and are therefore more authentic. Xiangyang big head cabbage, Xiangfan City, Hubei Province, Xiangzhou District specialty, China's national geographic indications products, big head cabbage and squash, like mustard, are varieties of mustard.