On April 2nd, at the construction site of the 200000 ton waterway at Beihai Tieshan Port in the northern part of Weizhou Island, Beihai, Guangxi, China, three large drag suction dredgers including China's top drag suction dredger "Dredging Sea 5" were operating simultaneously to accelerate dredging of this "golden waterway". The "Dredging Sea 5" is a self-propelled drag suction dredger with world advanced level, equipped with a domestically produced intelligent control system that can achieve remote monitoring and fault warning. It has multiple automation control technologies and functions such as dredging, hydraulic filling, transfer and backfilling. The maximum excavation depth can reach 45 meters, and the daily dredging volume of a single ship can reach 30000 cubic meters. The picture shows the launching operation of the rake for "dredging the sea 5". The picture shows the rake of 'Dredging Sea 5' starting its underwater operation.