Zhou Shu's Iron Smelting Hands Technique was not the most powerful among the techniques he knew, but it was the most unique.
The name, Iron Smelting Hands Technique, was ordinary, but it was extremely effective for forging.
Of course, it was only slightly interesting to Wang Xuanyi.
He only took a few glances before focusing on smelting the forging materials.
Zhou Shu didn't know how high Wang Xuanyi's cultivation was, but he suspected that Wang Xuanyi was very likely an existence at the Grotto-Heaven Master level.
Now, Zhou Shu already knew that there were still some Grotto-Heaven Masters who had lived until now. But they seemed to be in deep sleep, so he had never seen a living Grotto-Heaven Master.
Wang Xuanyi should be the first living person he had seen who seemed to be at the Grotto-Heaven Master realm.
Therefore, while Zhou Shu was forging, he was also secretly observing Wang Xuanyi.
