Sun Yat-sen is the comprehensive flagship with a serious medical school, South China University of Technology carries engineering, architecture and materials, and Jinan University is the one that matters most for international students: it is a university founded for the Chinese diaspora, with the highest proportion of overseas students in the country and a clinical medicine programme taught in English that has been running for decades.
Guangzhou's climate is the thing people underestimate. It is subtropical, not temperate: summer runs from April to October, and winter is short and mild. That suits some students and defeats others. The city's other advantage is proximity — Shenzhen is half an hour away by high-speed rail and Hong Kong is under an hour, which matters for internships, flights and weekend life.