Ming Jie was not shocked by what he heard. After all, he had already had a long time to think about things before the Innkeeper arrived. It was easy to assume that he reincarnated the moment he died, for it had felt that way to him. But with this matter, he was really out of his scope. While it was a possibility that not much time had passed, it was equally possible, and even more likely, that at least some time had elapsed between him dying and reincarnating.
Unfortunately, the mere fact that there was a possibility that not much time had elapsed gave Ming Jie hope, and that hope prevented him from moving on.
The Innkeeper said that the answer to his questions lay in finding the reason for his reincarnation, but to him it wasn't really a mystery. Although he did not understand where it came from, or even what its purpose was, his system literally called itself the 'Reincarnated as a Mountain' system.