20 10-06- 19 15:02? In a light blue and red carpet room, there are four keys W, X, Y and Z, and there is an invisible wall. Lots of books and questions. I am now 16 years old, and it is fate to meet you. I'm in Beijing (I can't get in touch, xem2xz@yahoo.cn). I remember when I was a child, about 200 1 year, I once had a CD of this kind, but I lost it. Nine years later (not everyone had access to the Internet at that time), I couldn't find it online. It's not junior high school level, so it's easy to pass.