通光线缆(300265.SZ)：深海电缆正处于市场开拓状态，尚未达产

Group 1 - The company is currently in the market development phase for its deep-sea cables, which have not yet reached full production capacity [1] - A joint venture with Yangtze Optical Fibre and Cable Co., Ltd. has been established to focus on the research, production, and sales of optical fibers and cables [1] - Teams from both companies have officially commenced work on the joint venture [1]