Zheng Qing did indeed go to someplace 'very high and far'.
But it wasn't with the teacher.
Two years ago, in the Cloud Sea World, when Zheng Qing was using 'Taiyi' to fight the Leviathan, he accidentally entered a high-dimensional space-time. The teacher went to bring him back.
Much earlier.
On Zheng Qing's birthday, the teacher gave him an opportunity to travel to a high-dimensional world as a birthday gift. On that day, the teacher clearly told him that there are downsides to low-level wizards entering a high-dimensional world—just like the old saying 'having experienced the vast ocean, it is difficult to find water everywhere else, after having seen Mount Wu, other clouds do not exist', having witnessed the grandeur and magical wonder of high-dimensional worlds, the ordinary world would appear exceptionally pale and dull in comparison, making it hard for ordinary wizards to expect even a hint of simple joy.
