Teacher Dong Yuhui held a meeting with 90,000 parents: Don't worry about your children's grades and insist on doing these three things well Teacher Dong Yuhui held a meeting with 90,000 parents: Don't worry about your children's grades and insist on doing these three things well Teacher Dong Yuhui held a meeting with 90,000 parents: Don't worry about your children's grades and insist on doing these three things well Teacher Dong Yuhui held a meeting with 90,000 parents: Don't worry about your children's grades and insist on doing these three things well Teacher Dong Yuhui held a meeting with 90,000 parents: Don't worry about your children's grades and insist on doing these three things well Teacher Dong Yuhui held a meeting with 90,000 parents: Don't worry about your children's grades and insist on doing these three things well Teacher Dong Yuhui held a meeting with 90,000 parents: Don't worry about your children's grades and insist on doing these three things well Teacher Dong Yuhui held a meeting with 90,000 parents: Don't worry about your children's grades and insist on doing these three things well Teacher Dong Yuhui held a meeting with 90,000 parents: Don't worry about your children's grades and insist on doing these three things well