A student of Yuxin High School uses "reassurance card" when she enters school in Hangzhou, capital of east China's Zhejiang Province, Sept. 1, 2004.

The high school has provided its students with this kind of "reassurance card" to help the management. Each student should use the card when he/she enters or leaves school.

The school and parents can know the information about the children including the time they enter and leave school, their exam marks and their behaviors in school via linked computers and mobile phones.