Rana chensinensis, also known as Rana chensinensis in China and Rana chensinensis in China, is an amphibian Rana chensinensis in Shui Ze, Heilongjiang Province, and is listed as one of the "Four Treasures" in Heilongjiang Province along with Bear's Paw, Feilong and Hericium erinaceus. In the cold season, they dive into the water for the winter, and after the vernal equinox, they begin to go ashore to lay eggs and reproduce. The body is fat and strong, the meat is tender and delicious. The dried products of oviduct of female frog (commonly known as frog oil) contain fat, protein, vitamins and hormones, which have the functions of tonifying kidney and essence, moistening lung and nourishing yin, and are tonics for strengthening the body.

Oviductus Ranae tastes sweet, salty and flat. Enter the lung and kidney meridians. Has the effects of invigorating kidney, replenishing essence, nourishing yin and moistening lung.