A member of security personnel stands on duty on an empty train platform inside a station on the Subway Line Number 1 on the eve of the Chinese Lunar New Year, in Beijing, China, February 7, 2016. According to local media, traffic in Beijing has seen a rare relief from its usual heavy pressure after 15 million people have left the city, heading for family reunions in their hometowns on the eve of the Chinese Lunar New Year of Monkey. (Photo by Jason Lee/Reuters)

A dancer performs before a judging panel during the World Irish Dancing Championships in Dublin, Ireland on April 11, 2017. The April 9-16 event draws some 5,000 performers from Ireland and overseas, including from both the Irish diaspora in places like the United States and Australia as well as less likely countries such as Russia and Japan. (Photo by Clodagh Kilcoyne/Reuters)

Promotional staff dressed in outfits of animation characters use a mobile phone at the Global Mobile Internet Conference (GMIC) 2015 in Beijing, China, April 28, 2015. (Photo by Kim Kyung-Hoon/Reuters)

Pole dancers in Mexico have taken to the streets to celebrate their sport and show others the skills involved. The Pole Dance National Day celebration saw pole dancers gather in parks, outdoor gyms and on streets, using street lamps, sign posts and other objects to put on displays across Mexico City. Photo: A woman performs a pole dancing routine on a pedestrian bridge during the national day celebration of “Urban Pole” dance in Monterrey June 8, 2014. (Photo by Tomas Bravo/Reuters)

Sakia Corona, 8, (C) takes part in a rehearsal of the Contemporary Haitian Dance in a communal center in downtown Havana January 30, 2015. Nearly 25 people, from the Haitian Contemporary Dance Company Petit Fey or Small Leaf, in Haitian Creole, rehearse a play called Papa Guede for future presentations in Havana. (Photo by Alexandre Meneghini/Reuters)

Dancers wear traditional dresses as they perform during women's dance festival in Jogeva, Estonia, June 12, 2016. (Photo by Ints Kalnins/Reuters)

Participants run at the “Half-Naked Marathon” at Olympic Forest park in Beijing, China, February 28, 2016. This annual running event which requires participants to run half-naked, was organized to promote environmentally friendly lifestyles. (Photo by Kim Kyung-Hoon/Reuters)