China's largest full-rotation, semi-submersible crane vessel was officially delivered in Jiangmen City on Wednesday. The vessel is equipped with a massive full-rotation luffing crane at its stern, with a 149-meter boom and a maximum lifting height of 172.5 meters, capable of precisely "grabbing" cargo at the equivalent height of over 50 stories. It runs an intelligent self-balancing system that works without manual control during operations. The vessel will support offshore wind farms and ocean projects, boosting China's global marine engineering edge.