Flying alone in the deep starry sky is really not a good enjoyment.

The tens of millions of kilometers between the major planets in the solar system made Luo Kai scratch his head. His current flying speed can reach ten times or even a hundred times the speed of sound, that is, ten Mach, hundreds of Mach, but the limit on the earth Speed ​​is not worth mentioning for the endless starry sky.

Shuttle between positive and negative space, if used frequently, the load on the body will be huge, it can only be used for

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