Women wearing face masks to help curb the spread of the coronavirus walk past a masked man browsing his smartphone on his bike in Beijing, Tuesday, July 20, 2021. (Photo by Andy Wong/AP Photo)





Aerial photo taken on July 13, 2021 shows terraced fields in Pengyang County of Guyuan, northwest China's Ningxia Hui Autonomous Region. (Photo by Feng Kaihua/Xinhua News Agency)





This photo taken on July 18, 2021 shows a crowd of people sprinkling water as part of a commercial event in Shenyang in China's northeastern Liaoning province. (Photo by AFP Photo/China Stringer Network)





Tourists enjoy cool water in a cave in summer on July 14, 2021 in Jinhua, Zhejiang Province of China. (Photo by Hu Xiaofei/VCG via Getty Images)





The 31st Qingdao International Beer Festival held an opening ceremony at the Golden Beach Beer City in Qingdao city, east China's Shandong province on July 16, 2021. (Photo by Rex Features/Shutterstock)





This aerial photo taken on July 19, 2021 shows electrical workers in a boat as they check solar panels at a photovoltaic power station built in a fishpond in Haian in China's eastern Jiangsu province. (Photo by AFP Photo/China Stringer Network)





Rescuers work to build an embankment at the site of a flooded tunnel in Zhuhai in southern China's Guangdong Province, Thursday, July 15, 2021. Rescuers were pumping out water Thursday to try to find 14 construction workers trapped by a flood in a tunnel being built in southern China. The rescuers have not been able to contact the workers missing since the 3:30 a.m. flood, the Zhuhai city emergency management department said in an online post. (Photo by Chinatopix via AP Photo)





Rescuers build embankments to pump out water from a flooded tunnel in Zhuhai city in south China's Guangdong province Friday, July 16, 2021. Divers have been dispatched in the search for 14 workers missing since water flooded a tunnel under construction in southern China three days ago, authorities said Sunday, July 18, 2021. (Photo by Chinatopix via AP Photo)





A woman wearing a face mask to help curb the spread of the coronavirus walks by the Microsoft office building in Beijing, Tuesday, July 20, 2021. The Biden administration and Western allies formally blamed China on Monday for a massive hack of Microsoft Exchange email server software and asserted that criminal hackers associated with the Chinese government have carried out ransomware and other illicit cyber operations. (Photo by Andy Wong/AP Photo)





A woman wearing a face mask to help curb the spread of the coronavirus bicycles past a smiley faces billboard outside a shopping mall in Beijing, Monday, July 19, 2021. (Photo by Andy Wong/AP Photo)





People move through flood water after a heavy downpour in Zhengzhou city, central China's Henan province on Tuesday, July 20, 2021. Heavy flooding has hit central China following unusually heavy rains, with the subway system in the city of Zhengzhou inundated with rushing water and thousands of residents having to be relocated. (Photo by Chinatopix via AP Photo)





In this photo released by Xinhua News Agency, vehicles pass through floodwaters in Zhengzhou in central China's Henan Province on Tuesday, July 20, 2021. At least a dozen people died in severe flooding Tuesday in a Chinese provincial capital that trapped people in subways and schools, washed away vehicles and stranded people in their workplaces overnight. (Photo by Zhu Xiang/Xinhua via AP Photo)





Heavy downpour in Zhengzhou city, central China's Henan province on Tuesday, July 20, 2021. (Photo by Chinatopix via AP Photo)





In this photo released by Xinhua News Agency, staff members set up warning signs with the words “Danger!” at a waterlogged area in Wuzhi County in central China's Henan Province on Tuesday, July 20, 2021. (Photo by Feng Xiaomin/Xinhua via AP Photo)





A traffic police officer guides residents to cross a flooded road with a rope during heavy rainfall in Zhengzhou, Henan province, July 20, 2021. (Photo by China Daily via Reuters)





This handout photo taken on July 20, 2021 and received on July 21 courtesy of Weibo user merakiZz-, shows a submerged subway car following heavy rains in Zhengzhou, in China's central Henan province. (Photo by Weibo user merakiZz/Handout via AFP Photo)





A man carrying a woman wades through a flooded road following heavy rainfall in Zhengzhou, Henan province, July 21, 2021. At least 25 people have died in China's flood-stricken central province of Henan, a dozen of them in a subway line in its capital that was drenched by what weather officials called the heaviest rains for 1,000 years. (Photo by China Daily via Reuters)





Residents wade through floodwaters on a flooded road amid heavy rainfall in Zhengzhou, Henan province, July 20, 2021. (Photo by China Daily via Reuters)





In this photo released by Xinhua News Agency, residents clean up the aftermath of a flood in Mihe Town of Gongyi City, in central China's Henan province on Wednesday, July 21, 2021. China's military has blasted a dam to release floodwaters threatening one of its most heavily populated provinces, as the death toll in widespread flooding rose to more than two dozens. (Photo by Han Chaoyang/Xinhua via AP Photo)





People walk through floodwaters along a street in Zhengzhou in central China's Henan Province, Tuesday, July 20, 2021. (Photo by Chinatopix via AP Photo)





In this aerial photo released by Xinhua News Agency, firefighters pump rainwater from a road underpass in Zhengzhou in central China's Henan province on Wednesday, July 21, 2021. (Photo by Ma Xiaoran/Xinhua via AP Photo)





A man smokes a cigarette near cars stacked on each other at an entrance of a tunnel following a heavy rain in Zhengzhou in China's Henan province on July 21, 2021. (Photo by Noel Celis/AFP Photo)