Hainan to Hong Kong Express (H2HE) is a 675 km submarine cable system connecting Hong Kong SAR and Hainan Province, Mainland China, with branch to Guangdong Province.

The H2HE cable system is the first 16 fiber-pair repeatered submarine cable system in the world, designed with SDM technology, achieving 19.2Tbps capacity per fiber pair, and 307.2Tbps system capacity. 

The H2HE cable system is invested and owned by China Mobile, supplied by HMN Tech.