The next Economic Policy to enhance Adjacency bonuses for a District, this time the Commercial Hub. Like the Harbor, its Adjacency bonuses yield File:Civ6Gold.png Gold, but it is comparatively easier to get good bonuses for the Hub than for the Harbor - it is rare to have more than 2 Sea resources in suitable location, so that you could get a bonus of 2+ for the Harbor; at the same time every tile next to a River will yield a +2 bonus for the Hub, and with little effort you could get 3 and more bonus. That means that, most of the time, it is more profitable to use Town Charters than Naval Infrastructure. The latter one, however, is available earlier; and anyway there are yet other possibilities to enhance your File:Civ6Gold.png Gold input - you should always think of which one exactly will