Group 1 - The completion of the main tower of the Shuangyumeng Grand Bridge marks a significant progress in the construction of the second phase of the Sixiang Highway Bridge project [1] - The Sixiang Highway Bridge project consists of multiple bridges and connecting lines, including the Shuangyumeng Grand Bridge and the Qinglongmen Grand Bridge, forming a highway corridor [1] - The project aims to enhance the sea-land intermodal transportation network of Ningbo-Zhoushan Port and promote the development of the Zhoushan Archipelago New Area and Zhejiang's marine economy [1]