Li Shi Ying got this thought because of the dimension hole where the goblins came out, wasn't there anymore when they got out from the mountain. Her feeling told her that the hole was opened in a random place.
But this hole had the same size every time it was opened in a random place. If this hypothesis was true...it would be very difficult to track the dimension hole whereabout.
[Then...how can I go home? We don't even know where the hole is now!] Nessie shrieked in frustration. A low threatening growl slipped out from his mouth. He was depressed. He wanted to go home!
[...how about you follow me for the time being? I'm going to travel to a lot of places. There's a chance you will find the hole again somewhere else] Li Shi Ying patted Nessie's neck feeling his frustration. She too actually wanted to shout like this.