This video shows that nowadays a great number of teenagers use Internet, and some of them even have not any necessary measures to protect themselves. Many of them have no sense of watchfulness to keep their safety, especially girls. The parents should teach their children not to give the real personal information to strangers because some people who have evil intentions may make use of these details to do evildoings to teenagers. A great deal of examples has shown that some of adults pretend they are young persons especially young girls to cheat the teenagers, and then they gradually become the aims of the Internet hunters. In this case, parents should give some advice to help the children to be kept safe on the Internet. Moreover, the government also should pay attention to using Internet.