Young people spending a lot of time on the internet, and it is, unresticted can cause a series of issue. Firstly , they are likely to loss control in their daily arrangement  for example, homework couldn't finished on time. Secondly, with the development  of internet, Young people have easy access to get in touch with sone illegality information, and it can take damage in their mental health growth. In addition, they could suffer from eye stain and lack of exercise cause  obesity problem  if teenage spend too much time focus on internet.