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Xie Jiuniang quietly retreated and first reached a nearby hidden corner, where she set up a Small Isolation Array.
She took out the Great Tortoise Shell, jumped on top of it, and performed the Thousand Catty Drop, forcibly pressing the Great Tortoise Shell into the mud, then camouflaged the surface until it was indistinguishable from its surroundings when viewed from the surface.
Xie Jiuniang wasn't afraid of someone using Divine Sense to search.
The Tortoise Shell was very special; Divine Sense couldn't detect it. It was as if it didn't exist at all.
Xie Jiuniang had tested it herself with Divine Sense. Even though the Tortoise Shell was right in front of her, when she closed her eyes and tried to perceive it with Divine Sense, she simply couldn't sense its presence.
She then uncovered the entrance to the Tortoise Shell and camouflaged it as well, making it undetectable at a glance, and the final step was to dismantle the Small Isolation Array.