A civilized planet (or at least one with good medical facilities) not far from several border worlds:
Wash mentions that it would be an eighteen-hour trip to reach Greenleaf in Out Of Gas (which, following Jaynestown, might mean they were coming from Higgins' Moon).
While looking for medical help for Book in Safe, Wash again mentions this planet, and Mal mentions that it is a ten-hour flight from their current location (Jiangyin).
