In the Ice Age Apocalypse, I Hoarded Billions of Supplies Chapter 3096: The Dagon Clan 4

Although the technological power in Lu Keran's hands was formidable, most of it was concentrated in the terrestrial and space domains. In the past, they had not paid attention to developments in the deep sea, so they could be said to have been walking with a limp. As Britannia was an island nation, it was considerably ahead of other countries in the field of submersible navigation. Zhang Yi said…