Workers make preparation for the sea trial of Tian Kun Hao, a Chinese-built dredging vessel, at a port in Qidong, east China's Jiangsu Province, June 8, 2018. The dredging vessel, the largest of its kind in Asia, departed a port in Jiangsu Friday afternoon for its first sea trial. The 140-meter-long vessel, with the designed capacity to dredge 6,000 cubic meters per hour, can dig as deep as 35 meters under the sea floor. The three-day sea trial will test its power system, speed and anchoring, and check other navigational aids such as radar and gyrocompass. After being tested, the vessel will sail back to the shipyard and is expected to be delivered in August. (Xinhua/Li Xiang)