Mazao had once touched my Divine Seal Fragment.
That happened after I had just told her about my encounter with Little Bowl Number Two in the Void Realm. To enter the Void Realm through the Divine Seal Fragment, Mazao once borrowed it from me, but it quickly returned to my hand automatically. Later, we even fell asleep while holding hands, both grasping the Divine Seal Fragment. I clearly saw that she was able to touch the Divine Seal Fragment normally.
Mazao had also come into contact with the Divine Seal Fragment bound to Little Bowl Number Two. Since that Divine Seal Fragment was first discovered by Little Bowl Number Two, it was impossible that Mazao had touched it before it had the chance to bind with Little Bowl Number Two. Otherwise, Mazao wouldn't have been able to describe to me the feel of the Divine Seal Fragment afterward or its unique property of not conducting heat.