1, avoid children’s exposure to content in life beyond their psychological age, some inappropriate language, images can have an unexpected effect on children’s sexuality and the awakening of sexual awareness, and may even lead to premature sexual maturity. 2, limit the intake of foods containing preservatives, coloring: such as fried, puffed food, etc. Avoid eating vegetables, fruits and vegetables that are out of season or may be contaminated by pesticides. 3, avoid exposing children to drugs and cosmetics containing sex hormones: there have been reports of boys applying their fathers’ testosterone-containing creams to trigger precocious puberty, and girls mistakenly taking birth control pills as sugar pills leading to breast development and vaginal bleeding. 4, careful purchase of toys, utensils, raincoats and other plastic products: many environmental endocrine disruptors, such as phthalates and other plasticizers, have a very clear risk of precocious puberty. 5. Adopt a good routine and ensure that your child gets enough sleep.