The end of the underground Spirit River

Running from the underground river all the way to the sea had indeed exceeded Lu Qing's expectations.

After flying a little further, he actually arrived at the mouth of the sea.

This place should be on the coastline of Dong Hai County, at the edge of the continental shelf that extended to the East. A big hole had been opened at the slope where the seabed suddenly became slanted.

From this hole, they could see the bottom of the sea where even the sun could hardly shine in.

Lu Qing was not in a hurry to continue exploring the depths of the sea. He checked the entrance of the cave.

The concentration of spirit Qi here had already reached the level of a level five spirit vein. However, he couldn't see anything unusual about the entrance.

At first, he thought that there was something special about the entrance that could change the seawater that flowed in from the entrance, making it purer and giving it a strong concentration of spiritual Qi.