It wasn't until he was in fifth grade and got a new teacher at the situation improved and his mother found out that his previous teacher used to spank him and pinch him and warn him not to tell her mother when he got home.
直到五年級換了老師，情況好轉，媽媽才知道，原來三、四年級的老師天天打他、捏他，還警告他「回家不許告訴媽媽」。