It started in the Song Dynasty and has a history of 800 years. It is a precious tribute to the courts of Ming and Qing Dynasties. This product can make a crisp and pleasant sound. It is called "Men's and Women's Ball" and is a traditional national product. Antique, elegant and generous, it has the function of strengthening the body and prolonging life. Suitable for all ages. It is a fine gift for relatives and friends, and is called "Oriental Treasure". It is not only a medical and health care device, but also has great ornamental and collection value.