Is there a school in Dalian where children's English is purely taught by foreign teachers?

Yes, Aston A+ in Dalian has pure foreign teachers' English courses for children. In fact, I don't think it's appropriate for a pure foreign teacher to enroll children in courses. After all, foreign teachers can't communicate with children. But you can go to Aston A+. There are many courses about children's English in his family. Think about it!