Yang Min, 15, of Shanghai, checks the phone for a missed call or message more than 60 times a day. “I can’t focus in class or do homework,” Yang says. “What’s wrong with me?”

Yang, along with many other teenagers in China, gets into trouble by using high-tech products like mobile phones and i-pads. High-tech products are good, but they also bring us many problems.

Wang Zihan, 16, of Beijing, used to check his e-mail every day. But in the last six months, he hasn’t visited his e-mail box. “There is too much junk mail in my box,” said Wang, “I have to find one piece of useful mail in mountains of junk mail. That’s annoying. ”

When Xu Shengna visited a website sent by a stranger last year, the 14-year-old lost her QQ account(账号) to a virus(病毒). She was very angry. “It was a terrible thing for me. QQ is the only way for me to communicate with some of my classmates and friends,” said Xu. “Now I have lost contact(联系) with them. I’ll never visit any websites sent from strangers again,” she added.

“High-tech products give modern middle school students a new way to learn and communicate,” said Liu Xiaodong, headmaster of a high school in Shanghai. “But students need self-control and they should learn to stay away from trouble. High-tech products can be their good teachers and friends.”