Tong Tu，with hopper capacity of over 20000m³ and maximum dredging depth of 90m, is the advanced TSHD in Asia, boasting the biggest hopper capacity and the deepest dredging. Being navigable in unlimited navigation areas and capable of self-contained dredging, dynamic positioning and tracking, the dredger is able to undertake projects of port and channel dredging, land reclamation, deep-sea sand mining and shore maintenance around the world.