Founded in 1999, Beijing Laocaichen, formerly known as Beijing Gushan Food Factory, has the world's largest fermented bean curd production workshop. In 2003, Lao Caichen passed the certification of ISO9001 quality system and HACCP food safety system, and was successively rated as "China Time-honored Brand" and "Top 2 of the Top 10 Enterprises of Sufu in China's Condiment Industry" by Beijing Consumers Association. As the leading product of Lao Caichen, its secret recipe for making fermented bean curd originated in Zhejiang, and then spread to Fujian, and has a history of more than 400 years since the Ming Dynasty. Lao Caichen bean curd products include three categories: red square, green square and white side, with diverse flavors, a wide range of choices and high quality, but unfortunately the flavor of fermented bean curd is not prominent enough compared with other brands. The price of the official flagship store of each category is about 8 yuan.