持之以恒 Persevering timelessly 攀登不止 Ascending ceaselessly
Zurich, Switzerland, 2007
Rio de Janeiro, Brazil, 2008
Chicago, United States, 2009
Würzburg, Germany, 2010
Darmstadt, Germany, 2011
Vancouver, Canada, 2011
Crete, Greece, 2012
Lisbon, Portugal, 2013
Munich, Germany, 2013
Seoul, Korea, 2014
Hong Kong, China, 2015
Tel Aviv, Israel, 2016
Vancouver, Canada, 2017
Bordeaux, France, 2018
Valencia, Spain, 2019
Berlin, Germany, 2019
Online Talk, 2020
Pingding, Shanxi Province, 2021
Datong, Shanxi Province, 2022
Tokyo, Japan, 2023
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