Does anyone know Tiankai intelligent machine? The children came back from school and said that many children in the class were using it, and their grades improved rapidly. He kept asking me to buy it

Does anyone know Tiankai intelligent machine? The children came back from school and said that many children in the class were using it, and their grades improved rapidly. He kept asking me to buy it for him. This is really good. My children have used it for almost two months. It used to be difficult to recite, but now it's fast and the quiz is good. The teacher praised my baby among the parents. You say this earphone is expensive, but so what? As long as the child is good, it doesn't matter how much it costs. Please buy it for the children quickly!