I just happened to see this problem, which I started a few days ago. The teacher is really good, and the name analysis is very detailed and very appropriate. However, the elderly in the family felt that the dialect sounded unpleasant and could not win over the elders, so they came to ask the teacher if he could start again. I thought the teacher would be unhappy, but he immediately replied that it was OK. Free restart, he is really a very responsible teacher.