2010, France, by Dr. Chen
2010, France, by Dr. Chen
2017, USA, by me
2016, Amsterdam, by the president of Amsterdam University
2013, Paris, by me
2013, Paris, by me
2012, Paris, by Boyan Li
2016, Peking, by Dr. Wang
2016, Peking, by Dr. Wang
2016, Amsterdam, by me
2011, France, by Dr. Chen
2009, France, by Dr. Chen
2017, Peking
2017, Peking, by Dr. Zhu
2017, Peking, by Dr. Zhu
2017, Peking, by Dr. Zhu
2016, Peking, by Murphy
2017, Denver, by a US friend
2018, Austria, by Dr Mei
2018, Peking, by Dr. Liu
2019, Seoul, by me
2022, Peking, by me
2022, Peking, by my wife
2022, Peking, by me