she was worried about her daughter. She tested her maths by the magazine just received.and She was shocked it's a waste of two months to study by the video.She was silent and sad to watch her daughter.she knew her.Her daugher is keen to study and eager for be praised.She tired peace herself and told herself the world is not like before.She swallowed. After several minutes,she helped her understand the term difference and relationship   between elements and set,and the symbols.she told her to write them down and pointed her minor error.It's the first time for her to do such concrete to fix or correct.

She almostly screamed when being told that woman acompaning her son to study in Fudan univeristy from Dalian.and she heard  a piece of news from her old classmate that her friend as a private tuitor for a student majoring computer in Jiaotong university to help him study Discrete Maths two years ago.

She's upset.Sometimes she complianed these.and no objection did she not received.Obviously they took those and act ed as these perhaps.

She's puzzled far than her daughter.it seems that her daughter's confident.