The ring he's holding is indeed the one he crafted with his own hands in the Abandoned Prison.
Although the core purpose at that time was to create a key to reach the Abandoned Prison, Fu Qian asserted that he didn't compromise on the pursuit of art and technology.
To fully embody the theme of the Mechanical Remake, he put quite a bit of effort into creating this complex and continually functioning structure—just like a clock.
That's right, Fu Qian's purpose in fiddling with it right now is actually quite simple. Just earlier, he mentioned a good way to counter Engraving Wisdom, which is to carry a timing device.
But honestly, considering the wear rate of his clothes, wristwatches and pocket watches aren't stable or reliable enough.
So, Fu Qian immediately thought of making slight adjustments to the ring in his hand, integrating this function onto it.
There was no need to actually engrave a dial, just to have a way to represent time, so it wasn't too difficult.
