C340 Confusion

"Is this the door leading to the bottom of the ice cellar?"

Kong Qing and Chen Xian stood in front of a large iron door. Although it was an iron door, they still felt that it was not an ordinary iron door. If it wasn't for the fact that it had been forged with many special metals, this iron door would have been completely frozen into a dead iron door in less than half a day. At that time