Recently, ZHONGHAIKE 1, the first cable laying and repairing vessel undertaken by CHI(Shanghai), was delivered at CHI(Shanghai) Marine Heavy Duty Terminal. The vessel is the most advanced self-powered cable laying vessel in China, with a hull length of 108.56 metres, a width of 24 metres, a total cable loading capacity of 3,000 dwt, and a full load displacement of 10,705 dwt. Equipped with advanced electric drive system, the vessel has a total output power of 10,260 kW and DP2 power positioning technology, which enables it to operate stably in any sea area in the world, with strong wind and wave resistance and unlimited navigation area. CHI(Shanghai) focused on three aspects: structural modification, precision installation of cable-laying equipment and mooring test of special functional equipment. During the fabrication of the aft cable inlet section, the project team compiled official drawings within two weeks through on-site mapping, modelling and repeated comparison and correction with the site, and completed the fabrication and CCS acceptance of four sections within 26 days. The precision installation of cable-laying equipment is another major difficulty in the transformation of ZHONGHAIKE 1. The project team closely negotiated and communicated with the equipment manufacturers, which finally ensured the smooth installation and commissioning of all the equipment.