Aerial photo taken on May 4, 2018 shows a container dock of Qingdao Port in East China's Shandong province. The port of Qingdao and the port of St. Petersburg has established friendly relations. Under the guidance of the "Shanghai Spirit" of mutual trust, mutual benefit, equality, consultation, respect for diverse civilizations, and pursuit of common development, Shandong strengthened cooperation with the Shanghai Cooperation Organization (SCO) member states. [Photo/Xinhua]

A freight train to Central Asia is seen at a railway station in Jiaozhou, East China's Shandong province, May 7, 2018. Under the guidance of the "Shanghai Spirit" of mutual trust, mutual benefit, equality, consultation, respect for diverse civilizations, and pursuit of common development, Shandong strengthened cooperation with the Shanghai Cooperation Organization (SCO) member states. [Photo/Xinhua]

File photo shows a production line of Haier-Ruba Economic Zone in Pakistan. Under the guidance of the "Shanghai Spirit" of mutual trust, mutual benefit, equality, consultation, respect for diverse civilizations, and pursuit of common development, Shandong strengthened cooperation with the Shanghai Cooperation Organization (SCO) member states. [Photo/Xinhua]