1. Affect children's interest in learning: If children are over-instilled with knowledge, they may lose their interest and motivation in learning. This may lead them to be unwilling to take the initiative to learn and lack the initiative and enthusiasm for learning.

2. Increase the pressure on children: Overinstilling knowledge may bring too much pressure and burden to children. They may feel stressed and unable to cope with tasks such as exams and homework, leading to anxiety and depression.

3. Restrict children's creativity: Overinstilling knowledge may limit children's creativity and innovation ability. They may become mechanically copying knowledge and lack the ability to think and create independently.

4. Affect children's physical and mental health: Overinstilling knowledge may lead to children's lack of other important hobbies and activities, such as sports, art, social interaction, etc. This may cause children to become anxious, isolated and lack of happiness.

Therefore, parents should instill knowledge properly, and at the same time give their children enough support and encouragement to give them the opportunity to develop other hobbies and abilities.