I had a very strange dream. I dreamed that I was practicing while walking on the mountain, and then I went up until I saw the realm of Buddha, but I didn't seem to achieve the goal of Buddha.

There are many kinds of dreams, some are the divination of dreams, and some are just the activities of brain cells. Predictive dreams are generally not interrupted, except in the early hours of the morning. That mountain is recorded in Buddhist scriptures, and it is a place that can cover all the spaces in the world better than the universe. Being able to dream means that I have read Buddhist scriptures in my previous life, at least a mage. This may be the memory of your soul, only the soul remembers the last life.