Google and Facebook are blocked in China, but that hasn't stopped the American companies from partnering with Chinese companies to build a data connectivity across the Pacific Ocean.

Google and Facebook will cooperate with Pacific Light Data Communication to jointly build a submarine cable with the speed of 120 Tbps per second to connect Los Angeles and Hong Kong.

Pacific Light Data Communication is a fully-owned subsidiary of China Soft Power Technology and it is a new player in the submarine cable sector.

Once the 12,800-kilometer cable can operate with a full load, it will become the largest capacity trans-Pacific cable. At present, the record is held by Faster, a trans-Pacific cable system landing at Chikura and Shima in Japan. The Faster consortium is comprised of China Mobile International, China Telecom Global, Global Transit, Google, KDDI and SingTel.

The new cable will become the sixth submarine cable in which Google has participated, following Unity, SJC, Faster, Monet, and Tannat.

Google said that the new cable will reduce delays and increase bandwidth for its customers in Asia Pacific, and Facebook's customers will gain the same benefits.