Hengtong Marine Cable Systems Co., Ltd(hereinafter referred to as "Hengtong Marine") was established by Hengtong Optic-Electric Co., Ltd. for submarine cable R&D production.

Currently, Hengtong Marine is the largest manufacturer of submarine optical cable in China, which covers the business of transoceanic communication system, submarine observation network system, special underwater cable system, offshore platform system and offshore new energy system.

Hengtong Marine is located on the south bank of Yangtze River, and has only 68 nautical miles from the estuary point. With hengtong's own port, it can dock two 10,000-ton ships at the same time, which also proves that Hengtong Marine is the only enterprise in China with the ability and capability of triple line loading tech. 

Hengtong Marine has its own world-class R&D center, manufacturing center, testing center, and 3 subsea repeater and branching unit integration centers.