Photo taken on Sept.17, 2019 shows workers unloading paper pulp from Tian Xi vessel at Qingdao Port in Qingdao, east China's Shandong Province. Tian Xi vessel of China's COSCO Shipping Specialized Carriers Co., Ltd. has arrived at Qingdao Port after wrapping up a voyage through the Arctic shipping route. Returning from Finland's Helsinki, Tian Xi vessel has transported nearly 30,000 tons of high-quality paper pulp back to China. (Xinhua/Li Ziheng)