China Unicom has landed a new subsea cable in Hong Kong.

The telco landed the SHV-HK submarine cable at its Hong Kong Tseung Kwan O L2 cable landing station (CLS). The system is set to connect it to Sihanoukville, Cambodia.

The cable, which was successfully landed at the end of last month, will be the first submarine cable directly connecting Hong Kong and Cambodia. SHV-HK is almost 3,000km (3,280 ft) long and has a total designed capacity of 80Tbps.

The new connection is part of Unicom’s “two horizontal and four vertical” integrated land and sea network, aiming to connect China to ASEAN, and builds on a cooperation agreement signed by China and Cambodia in October 2023.

Unicom’s Tseung Kwan O CLS commenced operation in December 2025. It already supports the SEA-H2X submarine cable connecting Southeast Asia to Hainan, China, and Hong Kong. The addition of the SHV-HK landing means Unicom has a parallel network of more than six international high-capacity submarine cables from Hong Kong to ASEAN.

In the future, the SHV-HK subsea cable can be extended to connect to Malaysia, Singapore, Indonesia, Hainan, and the Philippines.

Chinese state-owned Unicom is a telecommunications operator, with a portfolio including investment in more than 60 international submarine cable systems and more than 40 branches across the globe.

Tseung Kwan O, Hong Kong, which hosts the L2 CLS, is a new town built on reclaimed land in the northern half of Junk Bay. Sihanoukville, where the SHV-HK will connect, is a port city in southern Cambodia on the Gulf of Thailand.