1. Encourage children to participate in social activities: let children participate in some social activities that suit them, such as interest groups and sports teams. This will make it easier for children to meet like-minded friends.

2. Provide opportunities for children to practice their social skills: You can simulate some social scenes at home, such as talking with family and friends, or taking children to public places to communicate with others.

3. Cultivate children's self-confidence: introverted children often lack self-confidence, so they need the support and encouragement of their parents. By praising children's efforts and achievements, they can improve their self-confidence.

4. Help children understand the feelings of others: teach children how to listen to the thoughts and feelings of others and respect their opinions. This will make it easier for children to establish contact with others.

5. Seek professional help: If your child's introverted personality is serious and affects his daily life and study, you can consider seeking the help of a professional psychological counselor.