A worker lifts a shared bicycle from a stack of bicycles in the back of a cart along a street in Beijing, Wednesday, May 16, 2018. Bicycles have seen a resurgence in popularity in China's capital as bike-sharing services have flooded the streets and sidewalks with inexpensive rental bikes. (Photo by Mark Schiefelbein/AP Photo)





This photo taken on May 10, 2018 shows children imitating pregnant mothers, to feel how it is being a mother, ahead of the mother's day at a kindergarten in Haian in China's eastern Jiangsu province. (Photo by AFP Photo/Stringer)





Fishermen fishing by a giant net at Thousand Island lake in Chunan, Zhejiang, China on April 26, 2018. (Photo by TPG/Zuma Press/Rex Features/Shutterstock)





People display their skills with diabolos at Handan cultural and art centre square during the May Day holiday in Hebei, China on April 30, 2018. (Photo by Costfoto/Barcroft Images)





Tour guides step on steel wires between cliffs of Laojun Mountain on the first day of the International Workers' Day holiday on April 29, 2018 in Luoyang, Henan Province of China. Steel wires and stairs have been built on a cliff edge of Laojun Mountain as a new tourism project in Luoyang. Tourists enjoy climbing on the cliff edge during the 3-day International Workers' Day holiday. (Photo by Wang Zhongjun/China News Service/VCG via Getty Images)





Cars are parked in a 26-storey parking garage with automated parking system (APS) in Taiyuan city, Taiyuan city, Shanxi province, China on May 29, 2018. The parking lot is 50 meters tall and covers an area of 56 square meters, which are able to park 50 vehicles. (Photo by Imaginechina/Rex Features/Shutterstock)





A villager on a home-made boat collects water shield in Hangzhou, Zhejiang province, China on April 28, 2018. (Photo by Reuters/China Stringer Network)





Miao people celebrate a folk festival which falls on the eighth day of the fourth month in Chinese lunar calendar on May 22, 2018 in Anshun, Guizhou Province of China. (Photo by VCG/VCG via Getty Images)





A couple in wedding dress look at photos on the back of a camera near a propaganda slogan with the name of Chinese President Xi Jinping in Beijing, Saturday, May 19, 2018. Banners heralding the ruling Communist Party's philosophy and goals dot the streets of China's capital as a reminder to citizens of the government's aims. The full billboard reads “To more closely unite around the party central committee with Comrade Xi Jinping as the core, spare no effort to strive for the success of the great new era of socialism with Chinese characteristics”. (Photo by Mark Schiefelbein/AP Photo)





Men rests on the salt hill at the salt fields in Yancheng, Jiangsu Province, China, 15 May 2018. As the area of Yangcheng enjoys a mild climate and abundant sunshine, as well as large coastal mud flats, the area forms large natural salt fields. Silver Treasure Salt Company is one of the biggest producers of salt in China, producing more than 400,000 tons of salt per a year on 200 hectares of fields. The company has been producing salt since 1898 by evaporating seawater on the flats and collecting the crystalized salt that remains. (Photo by Aleksandar Plavevski/EPA/EFE)





A police officer and schoolchildren take part in an anti-terrorism drill at a primary school in Huaibei, Anhui province, China May 7, 2018. (Photo by Reuters/China Stringer Network)





Men look at women attending a yoga session a day ahead of Earth Day, inside a shopping mall in Taiyuan, Shanxi province, China April 21, 2018. (Photo by Reuters/China Stringer Network)





A statue stands at the site of a school destroyed in the 2008 Sichuan earthquake in the city of Beichuan, Sichuan province, China, April 4, 2018. (Photo by Jason Lee/Reuters)





Ethnic Lisu men play a game of billiards in Daxindi township of Nujiang Lisu Autonomous Prefecture in Yunnan province, China, March 24, 2018. (Photo by Aly Song/Reuters)





An ethnic Lisu man carries his crossbow as he poses for a photograph during a crossbow shooting competition in Luzhang township of Nujiang Lisu Autonomous Prefecture in Yunnan province, China, March 29, 2018. (Photo by Aly Song/Reuters)





Security personnel have lunch at the Auto China 2018 motor show in Beijing, China April 26, 2018. (Photo by Jason Lee/Reuters)





Ethnic Miao people play bamboo lushengs at the Lusheng Festival as a traditional way of praying for a good harvest in Congjiang county, Guizhou province, China April 27, 2018. (Photo by Reuters/China Stringer Network)





Shaolin martial arts students perform Kung Fu suspended on wires in a rehearsal for a live-action night show in Zhengzhou, Henan province, China April 28, 2018. (Photo by Reuters/China Stringer Network)





Technicians work on power cables on utility poles in Chuzhou, Anhui province, China May 10, 2018. (Photo by Reuters/China Stringer Network)





Deaf and hard of hearing people perform a Buddhist Guanyin Thousand Hand dance to mark Sunday's National Day for Helping the Disabled in Yunnan, Kunming province, China on May 19, 2018. (Photo by Wong Campion/Reuters)





Chefs lift the lid of a giant food steamer during a steamed dish competition in Tianmen, Hubei province, China May 27, 2018. (Photo by Reuters/China Daily)





In this June 12, 2012, file photo, an Air China flight attendant stands near model planes at the International Air Transport Association (IATA) 68th Annual General Meeting (AGM) and World Air Transport Summit in Beijing. Global airlines are obeying Beijing's demands to refer to Taiwan explicitly as a part of China, despite the White House's call this month to stand firm against such “Orwellian nonsense”. (Photo by Ng Han Guan/AP Photo)





Farmers dry edible rose petals in Haian in China's Jiangsu province on May 14, 2018. (Photo by AFP Photo/Stringer)





This photo taken on May 8, 2018 with a drone shows workers labouring on the construction of a double-deck suspension bridge crossing the Yangtze River in Wuhan in China's central Hubei province. (Photo by AFP Photo/Stringer)





This photo taken on May 17, 2018 shows a night view of a 145-metre (476 feet) high spokeless ferris wheel in Weifang in China's eastern Shandong province. The ferris wheel is made up of 36 pods that can carry 10 passengers each. (Photo by AFP Photo/Stringer)





Monks take part in a traditional mendicants' walk in Hangzhou in China's eastern Zhejiang province on May 22, 2018. Monks walked from Faxi Temple to Lingyin Temple as they received donation from residents for charity, to mark the birthday of Sakyamuni, founder of Buddhism. (Photo by AFP Photo/Stringer)