It depends on what you want to do and where you want to pursue your career.
If you want to stay in or near Shanghai, choosing Shanghai is undoubtedly a good choice. Generally, graduate students are engaged in research, so most of them choose to be teachers. If you want to go to the company, you might as well go after graduating from college.
"If you haven't studied Spanish, is it easy to take the postgraduate entrance examination?"
This question seems to have nothing to do with the last question about French, right? ! You want to say, "If you haven't studied French, is it easy to take the postgraduate entrance examination?"
Those who haven't studied French can't be admitted to French graduate students abroad, at least they have a certain foundation, because they have to take the national unified examination, and two questions in the postgraduate examination are French. Moreover, if you are not a French major, you must have a good knowledge of French literature or culture to be admitted.