A police officer stands guard on the sidewalk of a street adjacent to Tiananmen Square in Beijing, Saturday, June 4, 2016. Saturday marks the 27th anniversary of China's bloody crackdown on pro-democracy protests centered on Beijing's Tiananmen Square. (Photo by Mark Schiefelbein/AP Photo)





A girl poses for a photo along the barriers surrounding Tiananmen Square in Beijing, Saturday, June 4, 2016. (Photo by Mark Schiefelbein/AP Photo)





Visitors climb the steps of a pedestrian underpass while leaving Tiananmen Square in Beijing, Saturday, June 4, 2016. (Photo by Mark Schiefelbein/AP Photo)





In this Wednesday, November 11, 2015, photo, a worker prepares cooked ducks for sale at a Wal-Mart in Shenzhen, in southern China's Guangdong province. If Arkansas-based Wal-Mart wants to win over foreign consumers, it has to shed some of its American ways, and cater to very different customs and conventions. China is the ultimate prize. (Photo by Ng Han Guan/AP Photo)





In this Wednesday, November 11, 2015, photo, a shopper uses a net to catch live fish on sale at a Wal-Mart in Shenzhen, in southern China's Guangdong province. In American Wal-Marts, customers don't get to fondle their fish. But America is not China, as the world's biggest retailer has learned. If the Arkansas-based company wants to win over foreign consumers, it has to shed some of its American ways, and cater to very different customs and conventions that are fast changing. (Photo by Ng Han Guan/AP Photo)





In this Tuesday, November 10, 2015, photo, vendors wait for customers at a wet market in Shenzhen, in southern China's Guangdong province. Wal-Mart landed in China in 1996, opening two stores, a Wal-Mart supercenter and a Sam's Club, in Shenzhen. They were the first foreign retailers to offer the big-box shopping experience, which offers everything from clothing to food. That's a big change from traditional wet markets. (Photo by Ng Han Guan/AP Photo)





Visitors walk past the Tiananmen gate in Beijing, China, May 31, 2016. (Photo by Kim Kyung-Hoon/Reuters)





People take pictures of themselves in front of a giant portrait of Chinese late chairman Mao Zedong at the Tiananmen gate in Beijing, China, May 31, 2016. (Photo by Kim Kyung-Hoon/Reuters)





A girl holds a Chinese flag and takes picture of herself as people gather for a flag-raising ceremony at the Tiananmen Square in Beijing, China June 4, 2016. (Photo by Damir Sagolj/Reuters)





A girl salutes as others take pictures of themselves during a flag-raising ceremony at the Tiananmen Square in Beijing, China June 4, 2016. (Photo by Damir Sagolj/Reuters)





Paramilitary policemen hold weapons as they provide security near the Tiananmen Square in Beijing, China June 4, 2016. (Photo by Damir Sagolj/Reuters)





Students hold and present 5 yuan banknotes as they pose to camera with their teacher at a classroom ahead of China's annual national college entrance exam or “gaokao” in Hengshui, Hebei Province, China, June 3, 2016. The school offers each student participating in the national college entrance exam two 5 yuan banknotes bearing serial numbers as souvenirs, which means good luck. (Photo by Reuters/Stringer)





A student prays in front of a Confucius statue at Confucian Temple before she attends the China's annual national college entrance exam, which starts on June 7, in Beijing, China, June 4, 2016. (Photo by Jason Lee/Reuters)





A woman farms in front of a residential compound in Chenggong District of Kunming, Yunnan province, April 14, 2016. The Chinese characters on the boards read “already sold out”. (Photo by Wong Campion/Reuters)





A student hugs her teacher as she arrives at the Chen Jinglun High School for the first part of China's annual national college entrance exam, in Beijing, China, June 7, 2016. (Photo by Jason Lee/Reuters)





Teachers comfort a student before she walks into Chen Jinglun High School for the first part of China's annual national college entrance exam, in Beijing, China, June 7, 2016. (Photo by Jason Lee/Reuters)





A police gives a live interview to a local media during the first part of China's annual national college entrance exam, in Shanghai, China June 7, 2016. (Photo by Aly Song/Reuters)





A students gestures as he leaves the examination place after the first part of China's annual national college entrance exam in Lianyungang, Jiangsu Province, China, June 7, 2016. (Photo by Reuters/Stringer)





A parent prays at a Confucius statue (unseen) ahead of students taking China's annual National College Entrance Exam in Nantong, Jiangsu Province, China, June 6, 2016. (Photo by Reuters/Stringer)





An elderly man uses a fan to shade himself from the sun as he walks in a public park in Beijing, Tuesday, June 7, 2016. Thursday marks the Duanwu Festival, a public holiday in China celebrated with outdoor activities including dragon boat races. (Photo by Mark Schiefelbein/AP Photo)