January 15, 1983 (Saigon twelfth lunar month, the first two days), the completion of China's first 120 Road undersea cable communications engineering.

first 120 Road undersea cable communications engineering - Zhoushan submarine cable communication project, delivered on January 15, 1983. The project includes laying (history TodayOnHistory.com)
13 length of over 55 km of submarine cable, the seven telecommunications room and other supporting facilities. China's own design, manufacturing and the first 120 Road, submarine cables and carrier system.
the completion of the project has improved the communication links between Zhoushan and the mainland, also accumulated valuable experience for China's construction of submarine cable project.