PREVIEW
... made in a short amount of time, there was no negligence in the details.
In order to reduce operating costs, Wang Chen had specifically enhanced its insulation effect. The inside of the box was filled with compacted cotton wadding. Once the built-in Frost Artifact was activated, it could maintain a frozen state for a long time.
Wang Chen had tested it, and a single Spirit Stone could normally last for nearly one and a half days.
One day was just a conservative estimate. ...
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