In the old China, people were seduced by opium and many people had ruined their lives. Today, China becomes stronger and opium has become the history, but the new type drug catches people's attention all the time. When we walk around the street, we can find that most people are lowering their heads and playing smart phone. Smart phone has been the new drug for people, especially for young generation. They play it for such a long time that their body health is under threat. The news has reported many incidents of people feel uncomfortable after playing mobile phones for a long time. We need to use mobile phone in the proper way, or we will get into trouble.