2. Childbearing eldest sister-in-law refers to a kind of person who comprehensively grasps the relevant knowledge of life care, nursing, scientific education and conservation, and uses scientific methods to educate and train the baby's diet, sleep, motor skills, early education, intellectual development, social behavior and personality development.

3. The biggest duty of parenting sister-in-law is to educate and train the baby's diet, sleep, motor skills, early education, intellectual development, social behavior and personality development in a scientific way, and guide parents to carry out early education training for their children.

4. Work content: Assisting breastfeeding, mixing milk powder, adding complementary food to the baby, and being a nutritious child. Personal care: take the children to sleep, clean the baby's clothes and tableware, and clean the room. Read books, tell stories and sing children's songs to infants, communicate with infants regularly and actively in Mandarin, choose toys according to the guidance of children's neurological development, play games with infants and carry out potential development training.

5. Cultivate children's good living habits (defecation, hygiene, diet, etc.). ) and exercise children's communication with the outside world. Master the common sense of prevention and treatment of common diseases in infants and provide health advice.

Early childhood is a period of baby's language acceptance and pronunciation, so the Putonghua of the parenting sister-in-law (parenting teacher) will also seriously affect the baby. If the eldest sister-in-law (the teacher) has a strong local accent, it will often make the baby form irregular pronunciation habits in the critical period of language pronunciation, which will be difficult to change in the future.