Attendees visit the Ford booth during Auto China 2018 show held in Beijing, China, Wednesday, April 25, 2018. Auto China 2018, the industry's biggest sales event this year, is overshadowed by mounting trade tensions between Beijing and U.S. President Donald Trump, who has threatened to hike tariffs on Chinese goods including automobiles in a dispute over technology policy. (Photo by Ng Han Guan/AP Photo)

A woman is dragged away by Chinese men moments after she was seen talking to journalists near the site of a reported explosion outside the U.S. Embassy in Beijing, China, Thursday, July 26, 2018. A man exploded a small homemade bomb outside the U.S. Embassy in Beijing on Thursday, injuring only himself, according to police and an embassy spokesperson. (Photo by Ng Han Guan/AP Photo)

Two citizens splash hot water which is quickly frozen in the cold air on January 7, 2021 in Beijing, China. A strong cold wave sweeps across China as the Chinese capital Beijing recorded 19.5 Celsius below zero on 06 January morning, the lowest temperature since 1966, according to meteorological authorities. (Photo by Peng Yucai/VCG via Getty Images)

A municipal worker who helped with traffic control near a school is presented with flowers at the end of the national college entrance examinations, known as the gaokao, in Beijing, Friday, June 10, 2022. More than 11 million high school students throughout China took the annual college entrance exams which started on Tuesday after the country has just overcome severe COVID-19 outbreaks in Shanghai and Beijing, according to state media. (Photo by Ng Han Guan/AP Photo)

Humanoid robots fight during a kickboxing match on day two of the 2025 World Humanoid Robot Games at National Speed Skating Oval on August 16, 2025 in Beijing, China. The 2025 World Humanoid Robot Games (WHRG) will be held from August 14 to 17 in Beijing's National Speed Skating Oval, bringing together 280 teams from 16 countries across five continents. (Photo by Lintao Zhang/Getty Images)

Wang uses a mobile phone as she take a rest in her room at the accommodation where patients and their family members stay while seeking medical treatments in Beijing, China, June 23, 2016. Wang, who suffers from cervical cancer, came from Inner Mongolia to seek treatment at a specialist hospital in Beijing. (Photo by Kim Kyung-Hoon/Reuters)

Models painted in camouflage colours to blend in with the background pose for Chinese artist Liu Bolin's artwork “Dongji”, or Winter Solstice, on the second day after China's capital Beijing issued its second ever “red alert” for air pollution, in Beijing, China, December 20, 2015. In this artwork, Liu wants to express his concerns about China and its people, including air pollution problem, Liu told Reuters. (Photo by Kim Kyung-Hoon/Reuters)

Residents gather to watch fireworks rehearsals ahead of the upcoming 100th anniversary of the founding of China's ruling Communist Party in Beijing on Tuesday, June 22, 2021. Chinese authorities have closed Beijing's central Tiananmen Square to the public, eight days ahead of a major celebration being planned to mark the 100th anniversary of the founding of the ruling Communist Party. (Photo by Ng Han Guan/AP Photo)