Why should I write this book? It's because of a dream I had when I was a kid. At about six years old, I was able to remember my dreams. At that time, I had a wonderful dream. In my dream, after I walked out of the east gate of the city where I lived, along a small path surrounded by grass and trees. Eventually, I arrived at a very splendid place. Where in front of me, there is a body of blue water, sizes like a lake or ocean, color is blue, a little darker than the sky, and lighter than the ocean. The color of the water is very clear and bright, and waves are rippling in the water. Those waves are strange; they are like rows of Chinese fans, jumping up and down rhythmically. Each fan-shaped wave is inlaid with a white foamy edge, which is cheerful and bright. On the other side of the water is a mountain range; the stones on the mountain are colored, crystal-transparent, and shimmering. I have never seen the scenery in my real life, either in movies or in my hometown. In that era, we only believed in materialism and criticized idealism. We believe that thinking by day links to dreaming by night. However, the place I dreamed of was something I had never seen before. The place where I live has neither mountains nor sea. What's even stranger is that I have the same dream repeatedly. Later, the frequency of this dream became less and less; at about eight years old, this dream was completely replaced by other dreams. I have been wondering, why do I have such a dream? Because I was puzzled, I kept this dream hidden in my heart and didn't tell anyone. When I was studying for a master's degree, a friend of mine who became a monk came to visit me. He hasn't been a monk for a few years, but his exposure to Buddhism clearly inspired him. He told me that Buddhism is profound and involves various disciplines, and can answer all questions. So, I told him the puzzle hidden in my heart. I asked him: "Can Buddhism explain my dream?" He again confirmed with me: "Do you always go east every time?" "Yes, it is clear that I must go out of the east gate." "That's right," he said: "There is an oriental glazed medicine master Buddha world in Buddhism. The mountains are colored like glazed tiles." "What does this dream mean?" I asked. He replied: "It means you came from that world." I doubt it, but I have this matter in mind. After studying abroad, as my knowledge continues to expand, I begin to have a better understanding and ideas about my dreams. What you are about to read is everything I thought of for this matter. How did I write this book? I endeavor to write this book as a combination of popular science and science fiction so that readers can expand their knowledge of modern cutting-edge science and allow their thoughts to fly freely and enjoy the pleasure of transcending time and space. I am a scientist with a responsible attitude to science; the scientific research, social surveys, and case studies cited in this book indicate the author and source. Anything that has not been tested or confirmed by scientific methods is the speculation of others or myself.