Chinese President Xi Jinping (R, front) talks with members of the Chinese Youth Olympic delegation in Nanjing, capital of east China's Jiangsu province, Aug. 15, 2014. Xi paid a visit to the Chinese Youth Olympic delegation at the Nanjing Youth Olympic Village (YOV) in Nanjing on Friday. (Xinhua/Ma Zhancheng)
Chinese President Xi Jinping (R) meets with UN Secretary-General Ban Ki-moon in Nanjing, capital of east China's Jiangsu Province, Aug. 16, 2014. (Xinhua/Xie Huanchi)
Yu Yang (R), a health worker of the Beijing Friendship Hospital, kisses his wife before departure at the Beijing Capital International Airport,Beijing, China, Aug. 15, 2014.
Li Xin (1st R), an expert on infectious disease of Ditan Hospital bids farewell to his relatives and colleagues before departure at the Beijing Capital International Airport, Beijing, China, Aug. 15, 2014
Chinese medical workers pose for a group photo before departure at the Beijing Capital International Airport, Beijing, China, Aug. 15, 2014. The 24th Chinese medical team from the Beijing Friendship Hospital left for the Ebola-affected Guinea for a two-year aid mission on early Saturday. Besides, three public health experts from the disease prevention and control center, Ditan Hospital and Peking Union Medical College Hospital were also on the flight. (Xinhua/Li Xin)
A passenger poses for photo with the train from Lhasa to Xigaze at Xigaze Railway Station, southwest China's Tibet Autonomous Region, Aug. 16, 2014.
The first passenger train from Lhasa to Xigaze sets out from Quxu Railway Station in Lhasa, capital of southwest China's Tibet Autonomous Region, Aug. 16, 2014. A second railway line in southwest China's Tibet Autonomous Region, which is 251 kilometers long and links the regional capital Lhasa and Xigaze, the second-largest city in the region, was officially put into use. (Xinhua/Soinam Norbu)
Nine-year-old Suoyang (L) and her brother pose for photo as they take the first passenger train from Lhasa to Xigaze, southwest China's Tibet Autonomous Region, Aug. 16, 2014. A second railway line in southwest China's Tibet Autonomous Region, which is 251 kilometers long and links the regional capital Lhasa and Xigaze, the second-largest city in the region, was officially put into use. (Xinhua/Soinam Norbu)
Passengers ask for an autograph from the conductor of the train from Lhasa to Xigaze as memento after arriving in Xigaze by taking the first passenger train from Lhasa to Xigaze, southwest China's Tibet Autonomous Region, Aug. 16, 2014.
The first passenger train from Lhasa to Xigaze heads into Xigaze Railway Station, southwest China's Tibet Autonomous Region, Aug. 16, 2014
A high-speed 380A train waits for setting out at the West Railway Station in Nanchang, capital of east China's Jiangxi Province, Aug. 16, 2014. Some passengers were invited to experience the Hangzhou-Changsha segment of Shanghai-Kunming Highspeed Railway on Saturday. With the speed of 300 kilometers per hour, the high-speed train shortened the travel time from Nanchang to Changsha, a section of Hangzhou-Changsha segment, to one hour and 40 minitues. The Nanchang-Changsha section is expected to put into use at the end of this August. (Xinhua/Zhou Mi)
A train driver navigates a high-speed 380A train on a highspeed railway from Nanchang, capital of east China's Jiangxi Province, to Changsha, capital of central China's Hunan Province, Aug. 16, 2014.
Workers rescued from a tunnel collaspe walk out of a rescue passage in a collapsed tunnel in Shiqian County, southwest China's Guizhou Province, Aug. 16, 2014. Thirteen workers were successfully rescued on Saturday about 140 hours after being trapped in a collapsed tunnel in Shiqian. Medical workers said they were in good condition after a preliminary checkup at the scene. (Xinhua/Tao Liang)
Medical workers treat a rescued worker on an ambulance in Shiqian County, southwest China's Guizhou Province, Aug. 16, 2014.