Bright Muslian fermented milk at room temperature is a product of Bright Dairy Co., Ltd., and its producers are Bright Dairy (Dezhou) Co., Ltd. (D), East China Central Factory of Bright Dairy Co., Ltd. (Z), Nanjing Bright Dairy Co., Ltd. (N) and Jinhua Haihua Dairy Co., Ltd. (F).
In order to identify different manufacturers, the Chinese characters "Shan" (representing Dezhou, Shandong), "Min" (representing Minhang, Shanghai), "Jiang" (Jiangning, Nanjing) and "Jin" (representing Jinhua, Zhejiang) are used before the production date, and the manufacturers are identified by the codes and numbers representing their respective manufacturers after the production time.