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Aisikaier Wubulikasimu, 40-year-old Uighur acrobat, walks on a 18m long (59 ft), 50 mm wide (2 inch) tightrope strung between two hot air balloons, in Shilin county, Yunnan province, China. Wubulikasimu has previous broken two Guinness World Records for the fastest tightrope walk over 100m in 2009 and the steepest tightrope walk in 2011.