If you go abroad, it is definitely the best for Tongji University to study in Germany. She is the originator of German study abroad examination in China, which is equivalent to TOEFL training in New Oriental. Do you study in Nanjing or Shanghai? I suggest you go to Nanjing University to enroll in a full-time class for 800 hours before you go to Tongji. At that time, you would only spend your summer vacation in her DSH or Telford sprint class.