Construction workers need a head for heights as they build a glass suspension bridge at Balahu in Qianjiang, China, which is due to open in January 2020. (Photo by SIPA Asia/ZUMA Press/Alamy Live News)





This aerial photo taken on December 10, 2019 shows workers cutting ice blocks from the frozen Songhua river in Harbin, China's northeastern Heilongjiang province. Liu Yantao and his six co-workers toil on a frozen river in northeast China before dawn, using hand tools and machines to carve large ice bricks for the annual Harbin Ice Festival. (Photo by Noel Celis/AFP Photo)





Staff members set up lectern and red carpet before Chinese President Xi Jinping's arrival at Macau International Airport in Macau, China on December 18, 2019, ahead of the 20th anniversary of the former Portuguese colony's return to China. (Photo by Jason Lee/Reuters)





A soldier from the Chinese People's Liberation Army (PLA) jumps through a ring of fire during a military exercise in Shihezi, Xinjiang Uighur Autonomous Region, China on December 3, 2019. (Photo by Reuters/China Stringer Network)





A skating rink on the river for ice-skaters’ winter training in Yichun, China on December 10, 2019. (Photo by Costfoto/Barcroft Media)





A Chinese tourist uses the scarf of a friend as she is helped while she and others struggle to climb in the wind on an icy section of the Great Wall at Badaling, on a cold day after a snowfall on November 30, 2019 in Beijing, China. (Photo by Kevin Frayer/Getty Images)





A fishing enthusiast steers the rods through ice holes to catch fish on December 7, 2019 in Beijing, China. (Photo by Ma Wenxiao/VCG via Getty Images)





Performers attend the volunteers global recruitment programme launch event for the Beijing 2022 Olympic and Paralympic Winter Games, in Beijing, China, 05 December 2019. The organizing committee for the 2022 Winter Olympics launched its volunteers global recruitment programme to recruit 27,000 volunteers for the Olympic Winter Games and 12,000 volunteers for the Paralympic Winter Games. (Photo by Wu Hong/EPA/EFE)





People dance at a Retro Swing Night event in a shopping mall in Beijing, China on December 6, 2019. (Photo by Jason Lee/Reuters)





Protesters hold signs reading “Five Demands, Not One Less” during a rally in Hong Kong, Monday, December 16, 2019. (Photo by Mark Schiefelbein/AP Photo)





A protester holds Christmas cards for detained and jailed protesters during a rally in Hong Kong, Monday, December 16, 2019. China's premier said Monday that turmoil over amendments to extradition legislation has damaged Hong Kong society on all fronts. (Photo by Mark Schiefelbein/AP Photo)





People write Christmas cards for detained and jailed protesters during a rally in Hong Kong, Monday, December 16, 2019. (Photo by Mark Schiefelbein/AP Photo)





A woman writes a Christmas card for detained and jailed protesters during a rally in Hong Kong, Monday, December 16, 2019. (Photo by Mark Schiefelbein/AP Photo)





In this Sunday, December 15, 2019 photo, customers sit near stuffed frog dolls that have become a symbol of pro-democracy protesters at a restaurant in Hong Kong. Stores that have come out in open support of Hong Kong's pro-democracy protest movement, nicknamed “yellow shops”, make their politics plain and are winning customers in protest-hit Hong Kong because it. (Photo by Mark Schiefelbein/AP Photo)





In this Monday, December 16, 2019 photo, pro-democracy slogans are displayed on the head of pints of beer at a bar in Hong Kong. (Photo by Mark Schiefelbein/AP Photo)





In this November 28, 2019, photo, a solar panel installation is seen in Ruicheng County in central China's Shanxi Province. As world leaders gather in Madrid to discuss how to slow the warming of the planet, a spotlight is falling on China, the top emitter of greenhouse gases. China burns about half the coal used globally each year. Yet it's also the leading market for solar panels, wind turbines and electric vehicles. (Photo by Sam McNeil/AP Photo)





The lights of Hong Kong Island are reflected in the water as Star Ferry boats cross the harbor from Kowloon, in Hong Kong, Friday, December 13, 2019. Despite six months of ongoing pro-democracy protests in Hong Kong, day to day life continues as normal in much of the city. (Photo by Mark Schiefelbein/AP Photo)





A police robot patrols at Changchun Railway Station on December 2, 2019 in Changchun, Jilin Province of China. The police robot can patrol, monitor and also can recognize passengers' faces to compare with the faces of the escaped criminals. (Photo by VCG/VCG via Getty Images)





The Shougang Ski Jumping Platform turn on light for test at night, resembling a pair of large shining crystal high-heeled shoes, Beijing, China, 12 December 2019. The first newly built competition venue for Beijing 2022 Winter Olympic Games, the Shougang Ski Jumping Platform has been officially put into use recently as it will host the first event on December 12. During the daily competition from December 12 to 14, the Shougang ski jumping platform will hold three light shows to create a beautiful visual effect at night. (Photo by Lintao Zhang/AFP Photo)





A firefighter combats the blaze as a mountain fire is raging at Gaoming District on December 7, 2019 in Foshan, Guangdong Province of China. The fire broke out on Lingyun Mountain on Thursday afternoon in Foshan. No casualties have been reported. (Photo by VCG/VCG via Getty Images)





A fisherman with a close bond to cormorants uses the flock of birds to catch big fish in Li river in Guilin, China. The aquatic birds can be seen perching on a bamboo raft before swooping into the calm water to grasp hold of prey. (Photo by Julia Wimmerlin/Solnet News & Photo Agency)