Snow clam, also known as forest frog oil, is the fallopian tube in the female snow clam. It is a species unique to the northeast forest area. It has extremely high economic and nutritional value. It can hibernate for up to five months in the cold winter, under the snow or in glacial rivers. For a long time, it is named Hashima. It is a traditional nourishing product that is as famous as bird’s nest, sea cucumber and Cordyceps sinensis. It has a history of taking medicine for thousands of years in China. It was listed as a court tribute during the Ming and Qing Dynasties. It is known in medicine. "Animal ginseng", "green soft gold" reputation.