Hello, I'm from Harbin Engineering. First of all, congratulations on getting an interview. Every year, there are 200~300 companies to recruit in the job fair of five schools in Northeast China. It seems to me that this company also came last year. In addition, the qualifications and quality of the company to be recruited are no problem. Please rest assured. Finally, I suggest you go for an interview. You can get to know the people in the company well during the interview, and then decide whether to sign or not after you know it clearly.
Just a little advice. I wish you success!
PS: The employment agreement can be broken. Just go to the school employment office and make up a new agreement.