Police in tactical gear block a road leading to the Diaoyutai State Guesthouse in Beijing, Tuesday, March 27, 2018. Unusually heavy security at a Beijing guesthouse where prominent North Koreans have stayed in the past and media reports of a special train arriving have raised speculation that Kim Jong Un is making his first trip to China as North Korea's leader. (Photo by Mark Schiefelbein/AP Photo)





In this November 3, 2017 file photo, armed civilian patrol the area outside the Hotan Bazaar where a screen shows Chinese President Xi Jinping in Hotan in western China's Xinjiang region. Tibetan activists, housing petitioners and other campaigners are targets of a new national campaign in China against so-called organized crime. The sweep expands the range of people law enforcement officials can take into custody in the name of preserving peace and order. Analysts say the crackdown will help President Xi Jinping win political support in counties and villages, boosting his legitimacy as he prepares to rule the country indefinitely. (Photo by Ng Han Guan/AP Photo)





An ethnic Lisu man dances barefoot on hot charcoal embers to celebrate the annual Knife Pole Festival in Luzhang township of Nujiang Lisu Autonomous Prefecture in Yunnan province, China, March 29, 2018. (Photo by Aly Song/Reuters)





People pick tea leaves in Mianxian, Shaanxi province, north-west China on April 2, 2018. (Photo by Xinhua/Barcroft Images)





Visitors take pictures of cherry blossoms at Wuhan University in Wuhan, China on March 21, 2018. (Photo by Reuters/China Stringer Network)





Citizens visit and clean the gravesite of their ancestors to show their respect ahead of Tomb Sweeping Day (Qingming Festival) at a cemetery on March 29, 2018 in Nanjing, Jiangsu Province of China. (Photo by Yang Bo/China News Service/VCG via Getty Images)





A member of a military band plays the national anthem during the closing session of the National People' s Congress at the Great Hall of the People in Beijing on March 20, 2018. (Photo by Nicolas Asfouri/AFP Photo)





Yoga enthusiasts practise at Yellow Dragon Cave in Hunan, Zhangjiajie, China on March 25, 2018. (Photo by Xinhua/Barcroft Images)





This photo taken on March 28, 2018 shows an aerial view of a park decorated with different coloured flowers in Nantong in China's Jiangsu province. (Photo by AFP Photo/Stringer)





Wangguocheng 54, from Qiang, returns to the devastated home after the earthquake on March 28, 2018 in Wenchuan County Radish village, Ngawa Tibetan and Qiang Autonomous Prefecture, Sichuan province, China. This is a Qiang mountain village, which has a history of 4000 years. After the May 12, 2008 earthquake, 226 houses were damaged and 42 people died. The earthquake changed the water system, and the stockade was especially short of water. In 2010, the residents moved into their new houses. Now the source of income for the residents of radish village is due to the development of fruit planting and tourism. (Photo by Wang He/Getty Images)





A man performs a puppet show during a culture performance in Kunming, Yunnan province, China March 7, 2018. (Photo by Reuters/China Stringer Network)





Primary school students wear virtual reality (VR) headsets inside a classroom in Xiangxi Tujia and Miao Autonomous Prefecture, Hunan province, China March 14, 2018. (Photo by Reuters/China Stringer Network)





A police dog takes part in a training session with a police officer in Shenyang, Liaoning province, China on March 14, 2018. (Photo by Reuters/China Stringer Network)





Delegates leave the Great Hall of the People after the fifth plenary session of the National People's Congress (NPC) in Beijing, China March 17, 2018. (Photo by Thomas Peter/Reuters)





A public toilet is seen at a village of Nujiang Lisu Autonomous Prefecture in Yunnan province, China March 23, 2018. (Photo by Aly Song/Reuters)





An ethnic Lisu woman showers her daughter in a village of Fugong township of Nujiang Lisu Autonomous Prefecture in Yunnan province, China March 25, 2018. (Photo by Aly Song/Reuters)





A paramilitary police officer is seen near the Diaoyutai State Guesthouse, where foreign dignitaries usually stay, in Beijing, China March 27, 2018. (Photo by Jason Lee/Reuters)





Police officers keep watch next to a train at the Beijing Railway Station in Beijing, China March 27, 2018. (Photo by Jason Lee/Reuters)





An ethnic Lisu man climbs a knives ladder to celebrate the annual Knife Pole Festival in Luzhang township of Nujiang Lisu Autonomous Prefecture in Yunnan province, China, March 29, 2018. (Photo by Aly Song/Reuters)





People walk under cherry blossoms at Jiming Temple in Nanjing, Jiangsu province, China March 24, 2018. (Photo by Reuters/China Stringer Network)





Soldiers of China's People's Liberation Army (PLA) are seen during a military promotional event in Baoding, Hebei province, China March 30, 2018. (Photo by Reuters/China Stringer Network)





Delegates in ethnic minority dress arrive for the closing session of China's National People's Congress (NPC) at the Great Hall of the People in Beijing, Tuesday, March 20, 2018. (Photo by Mark Schiefelbein/AP Photo)