Overlooking qingshuitan Wetland Park in the air, thousands of Chinese fir trees turn green. Gaoyou City, Jiangsu Province, China, April 20, 2020. April 22 is world earth day. (Photo credit should read Costfoto/Barcroft Media via Getty Images)

Tobias Mueller of Germany falls as Johannes Aujesky of Austria competes in the Men's Ski Cross of Audi FIS Cross World Cup 2022 at Genting snow park on November 27, 2021 in Zhangjiakou, China. (Photo by Lintao Zhang/Getty Images)

A Chinese tourist visits the Mutianyu Great Wall covered in snow on February 23, 2021 in Beijing, China. Affected by the new coronavirus (COVID-19), the number of visitors to Mutianyu Great Wall in 2020 dropped by about 60%. (Photo by Lintao Zhang/Getty Images)

Jessie Diggins celebrates during a venue ceremony after winning the bronze medal in the women's sprint free cross-country skiing competition at the 2022 Winter Olympics, Tuesday, February 8, 2022, in Zhangjiakou, China. (Photo by Alessandra Tarantino/AP Photo)

Natalie Geisenberger of Germany, Johannes Ludwig of Germany, Tobias Wendl of Germany and Tobias Arlt of Germany celebrate their teammates slide winning gold during the Luge Team Relay on day six of the Beijing 2022 Winter Olympics at National Sliding Centre on February 10, 2022 in Yanqing, China. (Photo by Thomas Peter/Reuters)

Uzbekistan's Ekaterina Voronina competes during the long jump in the women's heptathlon at the 2022 Asian Games in Hangzhou in China's eastern Zhejiang province on October 1, 2023. (Photo by William West/AFP Photo)

Technicians check a CRH high-speed train at Shanghai Hongqiao High-speed train base on December 28, 2011 in Shanghai, China. China's railway stations have started today to sell tickets for the 2012 Spring Festival travel season scheduled to run between January 8th and February 16th, centred around the Chinese New Year which this year falls on January 23rd. (Photo by ChinaFotoPress/Getty Images)

Dai Shuqing's husband sits among adopted stray dogs at an animal shelter on December 15, 2006 in the outskirts of Xian of Shaanxi Province, China. The animal shelter, established by animal lover Dai Shuqing, is located at an abandoned warehouse which houses some 100 dogs and costs over 2,000 yuan (about US $255) per month. (Photo by China Photos/Getty Images)