For all cities with a population greater than five hundred thousand, Hong Kong Sar is closest to Shenzhen and farthest from Salta. The closest foreign city is Shenzhen. See below for the top 5 closest and farthest cities (domestically, internationally and by continent) and to see which cities, if any, Hong Kong Sar is the closest and farthest to. Filter to include all cities over 100k, 500k or 1 million in population.