2023 Apr 20th Exmouth, Australia
2021 June 10th Xilingol, China
2020 June 21st Xiamen, China
2019 December 26th Guam, USA
2019 July 2nd Vicuna, Chile
2019 January 6th Zhangjiakou, China
2017 August 21th Baker City, USA
2016 March 9th Balikpapan, Indonesia
2015 March 20th Longyearbyen, Norway
2012 May 21th Qinhuangdao, China
2010 January 15th Jining, China
2009 July 22th Yichang, China
2008 August 1st Beijing, China
1997 March 9th Beijing, China