1. University of Hong Kong (Hong Kong, China), Chinese University of Hong Kong (Hong Kong, China), Hong Kong University of Science and Technology (Hong Kong, China), Seoul National University (Korea), Tokyo University (Japan), Kyoto University (Japan), National University of Singapore (Singapore), Nanyang Technological University (Singapore), Leuven University (Belgium), Copenhagen University (Denmark

2. technical university of munich (Germany), University of Munich (Germany), University of Heidelberg (Germany), Paris University of Science, Technology and Humanities (France), Paris Institute of Technology (France), Sorbonne University (France), Paris University of Thackeray (France), Amsterdam University (Netherlands), Delft University of Technology (Netherlands) and Zurich Federal Institute of Technology (Switzerland).

3. Federal Institute of Technology Lausanne (Switzerland), Zurich University (Switzerland), Cambridge University (UK), Oxford University (UK), London Imperial College London (UK), University College London (UK), Edinburgh University (UK), Manchester University (UK), King's College London (UK), London School of Economics (UK), Bristol University (UK)

4. University of Glasgow (UK), University of Birmingham (UK), McGill University (Canada), University of Toronto (Canada), University of British Columbia (Canada), Massachusetts Institute of Technology (USA), Stanford University (USA), Harvard University (USA), California Institute of Technology (USA) and University of Chicago (USA).