The primary school health formula also includes:

Don't read or write in direct sunlight or dim light. Do not lie in bed or read at your desk. Don't play video games without restraint. Don't play more than 1 hour every day. Don't read while walking, let alone in the swaying carriage. Don't use too thin a pencil and write too small words. Drinking water even if you are not thirsty is taking the initiative to drink water. It is recommended to drink 6~8 glasses of water every day. Give priority to with warm water, a small amount for many times, and drink slowly in small sips, so as to keep the mouth moist all the time. Don't let dry mouth and bitter taste give orders to drink water before passive drinking. Pay attention to several best drinking time points: drinking on an empty stomach after getting up in the morning, one hour before three meals a day, and before going to bed at night. Other times, according to their own circumstances, as appropriate. The health formula is introduced as follows: read and write correctly, and keep the distance between eyes and books 30 to 35 cm. After reading 1 hour, take a rest and look into the distance. After watching TV 1 hour, rest for 5 to 10 minutes. The distance between the eyes and the TV screen should be 5 to 7 times the diagonal of the screen, but not less than 2 meters. After operating the computer continuously for 1 hour, rest for at least 10 minutes or do crystal exercises from near to far. Ensure outdoor activities every day 1 hour. Through physical exercise, the purpose of improving physical fitness and enhancing eye adjustment can be achieved. Resolutely correct bad habits such as partial eclipse and picky eaters, and develop good habits such as reasonable diet and balanced diet.