Hello, the products of Oriental Star have not been touched, so I don't comment. The logic dog product is a teaching material used by CCTV Little Wisdom Tree, and a logical thinking training system introduced from Germany by Sino-German Wisdom Company. Products are divided into textbook version and home version. The textbook version is not retail-oriented, but mainly for kindergarten teaching, while the home version is mainly retail-oriented, which is divided into home version for children (children aged 3-6), basic class for primary schools, and upgraded version for primary schools (including basic version). Each set of products is accompanied by a guide manual for parents to guide parents on how to improve their children's interest in learning and do a good job of parent-child interaction. This product is available in Xinhua Bookstore and b2c shopping malls such as JD.COM and Dangdang.