Blueberries are called blueberries because of the blue color of their fruit. One is low shrub, dwarf wild, small particles, rich in anthocyanins, China's wild blueberries are mainly produced in the Changbai Mountains, the Greater Khingan Mountains and the Little Khingan Mountains forest, because the blueberry is rich in anthocyanins, with the effect of activating the retina, can strengthen vision, prevent eye fatigue and attention.