Zhongtian Technology Submarine Cable Co., Ltd

Zhongtian Technology Submarine Cable Co., Ltd. (ZTTSC) is a wholly owned subsidiary of Jiangsu Zhongtian Technology Co., Ltd. dedicated to the research, development and manufacturing of submarine cable systems. Established as one of China’s earliest specialist submarine cable enterprises, it operates from Nantong in Jiangsu Province with a registered capital of RMB 1.88 billion. ZTTSC focuses on submarine optical fibre cables, AC and DC submarine power cables, composite power‑and‑fibre designs, electric submersible pump cables, hybrid cables and related accessories, supplying energy, industrial and telecommunications markets in China and internationally. Its products are applied in offshore wind farms, tidal and wave energy projects, offshore oil and gas developments, island interconnections, and lake or river crossings, serving utilities and project developers, including delivery of three‑core 500 kV AC submarine cable for the CGN Yangjiang Fanshi II offshore wind power project in Guangdong. The company underpins its activities with substantial R&D capabilities, operating the Jiangsu Provincial Key Laboratory of Marine Energy and Information Transmission and hosting a postdoctoral research workstation. It contributes to the development and deployment of high‑voltage DC submarine and land cables at ±160 kV, ±200 kV and ±320 kV, which have been used in Chinese flexible HVDC demonstration projects for islanded and long‑distance transmission. ZTTSC has received national recognition as a National Torch Program Key High‑Tech Enterprise, a National Manufacturing Champion Demonstration Enterprise, a National Enterprise Technology Center and a National Intellectual Property Demonstration Enterprise, and has been ranked among the Top 10 globally competitive submarine cable enterprises. The company aligns with ZTT Group’s green, low‑carbon manufacturing strategy, pursuing "7 Green" measures and science‑based carbon reduction commitments to support China’s "dual‑carbon" targets while also investing in employee wellbeing through on‑site fitness and psychological support facilities.