Hello, when children change their teeth, their teeth will be slightly crowded or have gaps temporarily, and there is no abnormal occlusion relationship. You can leave it alone for the time being, and then consider correction when the child's permanent teeth basically erupt (1 1 5 years old, and the permanent teeth are basically full) and the gap is still not closed.

You can observe whether the child's permanent teeth have erupted. If they are all outbreaks, we can consider revising them. It is ideal to correct the child 12 years old!

I can't say which hospital in Shanghai. Try to find a professional and regular hospital. Children's dental health is related to the quality of life when they are mature.