In the references, you can add the city name before the university name, for example, Peking University.

In references, in order to accurately identify the city where the university is located, brackets can be placed after the university name, and the city name can be written in brackets. This can avoid ambiguity and ensure that readers can clearly understand the specific location of the university. For example, if you want to quote Peking University in Beijing, you can write "Peking University (Beijing)". This marking method helps readers to better understand and locate relevant information.