A orbit ring is designed to run at the same speed as earth self-turning on the altitude of 6.45*105m, thus gets 80% of the gravity on earth surface and share the same 24hr a day, while at the same time a mirror surface covered the orbit ring creates refection of the earth and fakes a synchronized “sky” on the orbit ring, which makes the life on this orbit ring pretty much the same as on earth with the same time system and same sense of space, but much more convenient to travel into space.