translation.en: Because I love Mobius loops. I not only love Mobius loops, but I'm one of the very few people, if not the only person in the world, that makes Klein bottles.
translation.zh: 因为我一直迷恋莫比乌斯带。不只是莫比乌斯带， 我还是世界上独一无二 的制造克莱因瓶的人，