As far as I can see ,there are several resaons why more and more Chinese students tend to go abroad to further their study。
  

Firstly, some believe that foreign universitis provide better education than local universities do。They hold that a diploma granted by a foreign universitis can better prove their ability than a nornal one got from any univerties in China。
   Actually, it is too partial。

Secondly, overseas graduates, especially those who are graduated from prestigious universities like University of Cambrige are usually seen as excellent talents。
  Thus,they obtain more opportunities than local students in job-seeking。
  

In addition, to study abroad,actually,one can experiece a totally new life under an exotic cultural background,which boardens his or her horizon in a large extent。