This series is a series of picture books specially created for babies and children by Professor Chen Hui from the Faculty of Literature of Beijing Normal University. It is warm, lovely and suitable for children aged 2-4. Pair of bear brother and sister who lives in the deep forest is naughty and adorable. They are the best partners of each other. They play together, find food together, hibernate together, cope with the survival crisis together, and grow together...The story let small readers feel strong brotherhood and parent-child love and learn responsibility, care and love. (E- book and Audio- book available)