Is the sentence right? any corrections?

The circular specified that RMB could be used in the settlement for border trade between China and Vietnam, and expanded the pilot area from 20 kilometers within the borderline to 7 border provinces. "from 20 kilometers within the borderline" means the area with a distance from the border less than 20... show more The circular specified that RMB could be used in the settlement for border trade between China and Vietnam, and expanded the pilot area from 20 kilometers within the borderline to 7 border provinces.
"from 20 kilometers within the borderline" means the area with a distance from the border less than 20 kilometers.
pilot area means area with experiment programs.
Is it comprehensible and fluent? any corrections?
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