The first was that over the past two weeks, he had received a few notifications as to possible Yin body sightings that weren't too far from the Academy. Thus, it was proper for him to do some research. This involved several things, from learning the topography and environment, as well as learning the local powers and reputable figures that were active in the vicinity. IT wouldn't be good to provoke a local force by accident. He wasn't a young master with a golden finger in a novel. If anything went wrong, Di Tou didn't think that an old grandpa would come out of a ring and save him.
After all, his ring only let him contact an old grandpa who was G*d knows where and who hadn't even bothered to let him know how to use the ring, to begin with.