The system
SEA-H2X (South East Asia Hainan-Hong Kong Express) is an intra-Asia submarine cable system of roughly 6,000 km, supplied by HMN Tech with 8 fibre pairs and a design capacity above 200 Tbps. The system reached ready-for-service on 26 May 2026. The consortium comprises China Mobile, China Unicom and Converge ICT.
Landing points
| Landing site | Territory |
|---|---|
| Lingshui, Hainan | China |
| Tseung Kwan O, Hong Kong | China |
| La Union | Philippines |
| Tuas | Singapore |
| Songkhla | Thailand |
Why it matters for the region
Intra-Asia traffic has historically hairpinned through a small number of hubs. A direct express system between Southeast Asia, Hong Kong and Hainan shortens paths between ASEAN markets and southern China, which shows up in practice as lower round-trip latency for enterprise transit and content delivery, and as route diversity for carriers who would otherwise concentrate risk on older systems.
Where Sonia Satellite fits
Sonia Satellite Services delivers regional connectivity leveraging the SEA-H2X system, integrating subsea capacity with satellite and terrestrial layers so that customers consume one connectivity service rather than three separate media. Details of the service model are on the submarine cable solutions page.
Sources
LAST VERIFIED · 4 JULY 2026