Aerial photo taken on Aug. 10, 2018 shows a comprehensive inspection train running on the Jinan-Qingdao high-speed railway in Zouping section in Binzhou City, east China's Shandong Province. The Jinan-Qingdao high-speed railway started a joint test recently. With a designed speed of 350 kilometers per hour, the 307.9-kilometer railway is expected to be put into operation at the end of 2018. (Xinhua/Dong Naide)

Aerial photo taken on Aug. 10, 2018 shows a comprehensive inspection train running on the Jinan-Qingdao high-speed railway in Zouping section in Binzhou City, east China's Shandong Province. The Jinan-Qingdao high-speed railway started a joint test recently. With a designed speed of 350 kilometers per hour, the 307.9-kilometer railway is expected to be put into operation at the end of 2018. (Xinhua/Dong Naide)

Photo taken on Aug. 9, 2018 shows a comprehensive inspection train running on the Jinan-Qingdao high-speed railway in Zouping section in Binzhou City, east China's Shandong Province. The Jinan-Qingdao high-speed railway started a joint test recently. With a designed speed of 350 kilometers per hour, the 307.9-kilometer railway is expected to be put into operation at the end of 2018. (Xinhua/Dong Naide)

Aerial photo taken on Aug. 9, 2018 shows a comprehensive inspection train running on the Jinan-Qingdao high-speed railway in Zouping section in Binzhou City, east China's Shandong Province. The Jinan-Qingdao high-speed railway started a joint test recently. With a designed speed of 350 kilometers per hour, the 307.9-kilometer railway is expected to be put into operation at the end of 2018. (Xinhua/Dong Naide)