I'm from the physics department of Nankai University. See what you want to learn. Objectively speaking, I feel that the physics department of Nankai University is very strong in optics and condensed matter, and almost half of the professors are doing related content, followed by theory, which can rank among the top ten in the country. As for the others, there is no advantage. I'm not sure about Sun Yat-sen University. You'd better ask the undergraduates in the school. And pay attention to the opportunities offered by the school. Nankai physics has basic courses, and there will be more opportunities for research than ordinary schools. I wonder if there is one in Zhongshan. But Nankai offers few opportunities to go abroad. Finally, welcome to Nankai Institute of Physics.
In addition, as a student in Nankai, to correct Ertewu's words, I feel that no matter Nankai or Tianda, at least the funds are not as good as those in Beijing, especially after the Olympic Games. Moreover, the development gap between Tianjin and Beijing is very large. Doing academic work is ok, but other aspects, especially transportation, are not ideal.