Ruan Mingshu did not explain in detail, and Ning Cheng understood what she meant, namely that if someone did not hand over the Time Stone once obtained, it could still be detected. Unfortunately, his Xuan Huang Pearl could not store things for a prolonged period; otherwise, he would have placed the Time Stone inside the Xuan Huang Pearl. Since the Xuan Huang Pearl was a Creation Treasure, there was absolutely no chance anyone could detect the Time Stone if it was placed inside it.
Why did the Xuan Huang Pearl have to wait until all five elements of the origin were complete before it could store things? Ning Cheng thought about this and felt even more certain that there must be a way to store things in the Xuan Huang Pearl, at least temporarily.