Train the baby's ability from sucking to chewing to prepare for weaning. Regardless of breast milk or milk feeding, the baby will only do sucking, not chewing up and down. When adding pasty food, when the baby comes into contact with the food, he will try his lips to eat the food, which is called the lip-eating period. When food enters the mouth from the lips, the tongue will use the action of the tongue to eat, and finally eat under the action of the gums.
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