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