Summer is a wonderful season for many school children.But for Sun Zhengwen,a 13-year-old girl in Qingdao,east China's Shandong Province,it was a very dark time.On July 8,just days into the holidays she jumped off a building and killed herself,leaving behind a threepage suicide note accusing her parents of violence and abuse. According to Sun's note,on the evening of July 6,her father found that she did not finish a question in her homework assignment.He slapped her on her left cheek,to which she screamed "I lost my hearing," prompting a harder slap to the right side of the face that sent her to the ground,reeling.She wrote that her parents continued to beat her until she lost consciousness,and she did not wake up until the next morning.