When I was a child, I heard my grandma say: "At 12 o'clock in the middle of the night, there are subways that lead to all walks of life. People who have the opportunity or special abilities can see the trains and reach other worlds. The golden train reaches the heaven, the white train reaches the Shangqing sky, the red train reaches the Shura world, and the black train reaches the demon world." This story came to me when I was reading a very normal fantasy novel about a man and a woman. I didn't know what was going on, so I turned it into a BL... My cultural level is limited, so I'll be surprised if I make mistakes... Regarding the name of the protagonist, I was reading a novel online and suddenly wanted to write a novel, so I signed up on impulse. Then, when I was writing the book, I realized that I had thought of the name of the protagonist. I just happened to find a RMB on my table. I was distracted again. From RMB, I thought of US dollars, and further thought of euros. Just like that, the name of the protagonist appeared...