Is it okay for children to read novels for five or six hours a day on their smart phones?

The timing of a child reading a novel on a smartphone depended on the child's age, vision, eye health, and other factors. Generally speaking, children under the age of 2 are not recommended to use a smartphone because their vision and eyes are not fully developed. Children aged 2-10 should limit their smartphone usage to 2-3 hours a day to ensure their vision and eye health. In addition, parents should also make sure that the environment in which their children use the smartphone is bright enough to avoid staring at the screen for a long time. For children over the age of 10, the time they use their smartphone can be extended appropriately, but it should not exceed 4-5 hours. In addition, parents should also pay attention to the posture and time of their children's use of the smartphone to avoid negative effects on their eyes and body health. The time of using the smartphone should be appropriate and ensure the child's vision and eye health. Parents should guide and supervise their children's use to ensure that they can safely use the smartphone.