Students training to be flight attendants hold books on their heads, chopsticks in their mouths, and papers in between their knees, as they take part in a standing posture practice at a vocational school in Shijiazhuang, Hebei province, China May 4, 2017. (Photo by Reuters/Stringer)

World Champion Matthias Dolderer of Germany flies over the Horseshoe Bend near Lake Powell in Page, United States during the transfer flight from Indianapolis to Las Vegas to prior the final stage of the Red Bull Air Race World Championship on October 12, 2016. (Photo by Predrag Vuckovic/AFP Photo)

Aymara indigenous women “Martha La Altena” (El Alto's Martha) (R) and “Susana La Bonita” (Pretty Susana) take part in a freestyle wrestling flight in El Alto, on June 29, 2018. “Cholita Fighters” aim to include their show in a tourist route. (Photo by Aizar Raldes/AFP Photo)

British puffin mid-flight with a beak full of small fish, their favourite foods being sand eels, herring and hake in Farne Islands, United Kingdom in June 2022. These pint-sized creatures are just 12 inches in height and have a wingspan of 25 inches. (Photo by Mathijs van Lisdonk/Media Drum Images)

Hundreds of flamingos take flight in the Rift Valley in East Africa early September 2024. The birds gather in the region’s saline lakes to eat the blue-green algae that grows in abundance. The red-orange pigment in the algae is what gives them their distinctive pink plumage. They also use the site to breed. (Photo by Alexandre and Chloe Bes/Naturagency/Solent News)

A Chinese girl peeps at Santa at a shopping center on Christmas Eve December 24, 2011 in Beijing, China. Though Christmas is not officially celebrated in China, the holiday is becoming increasingly popular as Chinese adopt more Western ideas and festivals. (Photo by Feng Li/Getty Images)

In this photo made late Saturday, August 9, 2014, in Keelung, Taiwan, a traditional Chinese dance troupe performs during a parade marking the beginning of the Chinese folklore's mid-summer's Ghost Month Festival. Fourteen days into the seventh month of the lunar calendar, August 9, in 2014, marks the traditional Chinese Ghost Month where the gates of the underworld are opened and spirits of the deceased are set free to roam the world of the living. The month long festivities are aimed to please the roaming spirits. (Photo by Chiang Ying-ying/AP Photo)

A performer takes part in a night parade to celebrate Chinese New Year in Hong Kong Friday, February 16, 2018. The Lunar New Year this year marks the Year of the Dog in the Chinese calendar. (Photo by Vincent Yu/AP Photo)