On the summer night of 1995, Lin Xu, a graduate of the Department of International Trade, encountered a bizarre shipwreck on Guitou Reef where his father disappeared, clutching a blood-stained sailing diary. When the sextant pierced the palm of his hand, a faint blue light curtain exploded in front of his eyes - [The Canghai system was activated, and it was detected that the host's DNA matched the Ming Dynasty maritime merchant Lin Daoxuan with a 99.7% Matching rate]. This golden finger, which has the ability to detect and communicate with marine life with sonar, makes him fall into a deeper fog: the hesitant look in the eyes of the lighthouse keeper Chen Bo, the excavator used by the developer Zhao Tianba to block the fishing boat, and the sentence in the diary circled in blood "Tide of the 15th day of July".
Under the guidance of the system, Lin Xu resumed his father's unfinished longline fishing business, but salvaged a Ming Dynasty jade scale engraved with a star map from the fishing net. When the instrument resonates with the abandoned lighthouse on the seabed, it actually projects a magnificent shadow of the Dragon Palace under the coral reef - the ecological black technology buried by Zheng He four hundred years ago is awakening. However, every time a shipwreck was unlocked, Zhao Tianba's gambling boat moved ten miles closer to the high seas. When diving in the middle of the night, he even discovered that the construction team was pouring cement piles mixed with Japanese pirate ashes into the seabed.
As the glowing corals that can purify seawater revive, threats follow: the mutated octopus that swallows fishing nets, the Spanish ghost ship that appears in the eye of a typhoon, and the bronze door deep in the Dragon Palace engraved with Lin Xu's birthday. The system kept warning [the mantle pressure value is 97%], but the ship model left behind by my father actually automatically put together a submarine city defense map. When Zhao Tianba detonated reclamation explosives and caused a tsunami, Lin Xu had to initiate the ultimate agreement at the Dragon Palace Altar - using himself as an anchor to connect the entire East China Sea ecological chain to his own nerve endings.
