![Chinese-built dredging vessel Tian Kun Hao is seen sailing on the sea on Jan. 8, 2019. Tian Kun Hao, a Chinese-built dredging vessel, which is the largest of its kind in Asia, returned to the shipyard Wednesday after completing its sea trial of nearly three months. The 140-meter-long, 27.8-meter-wide vessel can dig as deep as 35 meters under the sea floor and dredge 6,000 cubic meters per hour, according to its investor, Tianjin Dredging Co., a subsidiary of China Communication Construction Co. (Xinhua)](http://www.ecns.cn/hd/2019/01/10/fe78e47da3a54fe496800b4417bffb91.jpg)
Chinese-built dredging vessel Tian Kun Hao is seen sailing on the sea on Jan. 8, 2019. Tian Kun Hao, a Chinese-built dredging vessel, which is the largest of its kind in Asia, returned to the shipyard Wednesday after completing its sea trial of nearly three months. The 140-meter-long, 27.8-meter-wide vessel can dig as deep as 35 meters under the sea floor and dredge 6,000 cubic meters per hour, according to its investor, Tianjin Dredging Co., a subsidiary of China Communication Construction Co. (Xinhua)
![Aerial photo taken on Jan. 8, 2019 shows the Chinese-built dredging vessel Tian Kun Hao sailing on the sea. Tian Kun Hao, a Chinese-built dredging vessel, which is the largest of its kind in Asia, returned to the shipyard Wednesday after completing its sea trial of nearly three months. The 140-meter-long, 27.8-meter-wide vessel can dig as deep as 35 meters under the sea floor and dredge 6,000 cubic meters per hour, according to its investor, Tianjin Dredging Co., a subsidiary of China Communication Construction Co. (Xinhua)](http://www.ecns.cn/hd/2019/01/10/0b3e4e7d8f5b40f2b137f6c73c45347d.jpg)
Aerial photo taken on Jan. 8, 2019 shows the Chinese-built dredging vessel Tian Kun Hao sailing on the sea. Tian Kun Hao, a Chinese-built dredging vessel, which is the largest of its kind in Asia, returned to the shipyard Wednesday after completing its sea trial of nearly three months. The 140-meter-long, 27.8-meter-wide vessel can dig as deep as 35 meters under the sea floor and dredge 6,000 cubic meters per hour, according to its investor, Tianjin Dredging Co., a subsidiary of China Communication Construction Co. (Xinhua)
![Chinese-built dredging vessel Tian Kun Hao conducts dredging work on Oct. 19, 2018. Tian Kun Hao, a Chinese-built dredging vessel, which is the largest of its kind in Asia, returned to the shipyard Wednesday after completing its sea trial of nearly three months. The 140-meter-long, 27.8-meter-wide vessel can dig as deep as 35 meters under the sea floor and dredge 6,000 cubic meters per hour, according to its investor, Tianjin Dredging Co., a subsidiary of China Communication Construction Co. (Xinhua)](http://www.ecns.cn/hd/2019/01/10/af6e7b6adf804e22b7b8789f56c99d2b.jpg)
Chinese-built dredging vessel Tian Kun Hao conducts dredging work on Oct. 19, 2018. Tian Kun Hao, a Chinese-built dredging vessel, which is the largest of its kind in Asia, returned to the shipyard Wednesday after completing its sea trial of nearly three months. The 140-meter-long, 27.8-meter-wide vessel can dig as deep as 35 meters under the sea floor and dredge 6,000 cubic meters per hour, according to its investor, Tianjin Dredging Co., a subsidiary of China Communication Construction Co. (Xinhua)
![Chinese-built dredging vessel Tian Kun Hao is moored at the shipyard after completing its sea trial on Jan. 9, 2019. Tian Kun Hao, a Chinese-built dredging vessel, which is the largest of its kind in Asia, returned to the shipyard Wednesday after completing its sea trial of nearly three months. The 140-meter-long, 27.8-meter-wide vessel can dig as deep as 35 meters under the sea floor and dredge 6,000 cubic meters per hour, according to its investor, Tianjin Dredging Co., a subsidiary of China Communication Construction Co. (Xinhua)](http://www.ecns.cn/hd/2019/01/10/bb69014d322b4065b596f542186e095a.jpg)
Chinese-built dredging vessel Tian Kun Hao is moored at the shipyard after completing its sea trial on Jan. 9, 2019. Tian Kun Hao, a Chinese-built dredging vessel, which is the largest of its kind in Asia, returned to the shipyard Wednesday after completing its sea trial of nearly three months. The 140-meter-long, 27.8-meter-wide vessel can dig as deep as 35 meters under the sea floor and dredge 6,000 cubic meters per hour, according to its investor, Tianjin Dredging Co., a subsidiary of China Communication Construction Co. (Xinhua)
![Chinese-built dredging vessel Tian Kun Hao conducts dredging work on Oct. 19, 2018. Tian Kun Hao, a Chinese-built dredging vessel, which is the largest of its kind in Asia, returned to the shipyard Wednesday after completing its sea trial of nearly three months. The 140-meter-long, 27.8-meter-wide vessel can dig as deep as 35 meters under the sea floor and dredge 6,000 cubic meters per hour, according to its investor, Tianjin Dredging Co., a subsidiary of China Communication Construction Co. (Xinhua)](http://www.ecns.cn/hd/2019/01/10/96a17524454749c7b7eb5e8c49f7cde8.jpg)
Chinese-built dredging vessel Tian Kun Hao conducts dredging work on Oct. 19, 2018. Tian Kun Hao, a Chinese-built dredging vessel, which is the largest of its kind in Asia, returned to the shipyard Wednesday after completing its sea trial of nearly three months. The 140-meter-long, 27.8-meter-wide vessel can dig as deep as 35 meters under the sea floor and dredge 6,000 cubic meters per hour, according to its investor, Tianjin Dredging Co., a subsidiary of China Communication Construction Co. (Xinhua)