hildhood family environment, Gao Yang suddenly had a question, “How old were you when you started learning the piano”>>"There are also piano lessons online. When no one is around, I practice by myself...oesn't eat snacks. If there are any that don't suit your taste, you can tell me, and next time I won't have them delivered."Ou Yan usually doesn't eat snacks, but seeing her big brother be so thoughtf...