Participants climb stairs past the 65th floor while competing in the China World Summit Wing Beijing Vertical Run in Beijing, Saturday, Aug. 25, 2018. Hundreds of race participants on Saturday climbed 82 floors, covering a total of 2,041 steps, to the top of the 330-meter (1,083-foot) tower located in Beijing's central business district. [Photo: AP/Mark Schiefelbein]

Security officials stand on the roof of the China World Summit Wing near the under-construction 528-meter (1,732-foot) China Zun Tower during the China World Summit Wing Beijing Vertical Run in Beijing, Saturday, Aug. 25, 2018. Hundreds of race participants on Saturday climbed 82 floors, covering a total of 2,041 steps, to the top of the 330-meter (1,083-foot) tower located in Beijing's central business district. [Photo: AP/Mark Schiefelbein]

Elite division winners Suzy Walsham of Australia, left, and Mark Bourne of Australia hold their winners' plaques after competing in the China World Summit Wing Beijing Vertical Run in Beijing, Saturday, Aug. 25, 2018. Hundreds of race participants on Saturday climbed 82 floors, covering a total of 2,041 steps, to the top of the 330-meter (1,083-foot) tower located in Beijing's central business district. [Photo: AP/Mark Schiefelbein]