For some reason this comment collected a few down votes so here is a reference to the Chinese GPS system [1] [1]https://en.wikipedia.org/wiki/BeiDou_Navigation

For some reason this comment collected a few down votes so here is a reference to the Chinese GPS system [1] [1]https://en.wikipedia.org/wiki/BeiDou_Navigation_Satellite_System https://en.wikipedia.org/wiki/BeiDou_Navigation_Satellite_Sy...