A Cove

The storage area of the city was in the form of a large cove. 

This cove was attached to a lake that extended further out into the border of the city before merging into the ocean. It was a stunning sight to find a lake and cove under the ocean.

Inside this cove were several sections that were being used as a warehouse. One of the warehouses was used as the Immortal stone storage, while several others were used as Immortal Qi storage and condensing sections.

They were even located in a row, acting as a 'production line'. 

The first warehouse would first gather the immortal Qi and would start transferring it to the next one after it was about 90% filled. The second one would do the same and transfer to the third upon reaching the 90% mark as well.

But from the fourth warehouse onwards, there was no 90% limit. Instead, the immortal Qi was allowed to flow freely between the fourth and tenth warehouses, forming a large buffer space.