Myopia is increasingly prevalent all over the world as digital products become more attractive as children's entertainment. Prolonged focus on close object increases the risk of myopia. Tencent Video uses face recognition technique to accurately calculate the distance between the eyes of the users and the device. The video will become blurred if the distance between child and device is shorter than the safe distance (40cm–60cm). Tencent Video not only provides a great viewing experience, but is also safe for kids.