Bean foam is known as the "living stone in snacks", bean foam is actually made with millet noodles, and Wu'an magnetic mountain is the birthplace of magnetic mountain culture, Xiaomi originated from that period. The bean foam originated from the magnetic county of Linyi and Linyi. It has a history of more than 3,000 years. From this point of view, the name "living fossil" can be described as a veritable name.