Production of basic resources (gold, timber, stone)
First, place a serf to the cell with the needed type of resources (woods for timber, mountains for stone) and order him to collect them. The distance at which serfs can move away from the city depends on the level of the city, so resources can be extracted only within this radius.
When selecting a serf, you can observe the following data in the information panel:
Collecting - collecting speed for one unit of a resource. Each resource has its own collecting speed. You serfs will work faster after each upgrade of your Factory building.
Delivery - After a unit of resource has been collected, it needs to be delivered to the castle. The further the serf collects the resources, the longer it will take to deliver them. Each resource has its own delivery speed per cell. Your serfs will deliver resources faster after each upgrade of your "Roads" building.
Progress - total resource production time = collecting time + delivery time. The "progress" indicator shows the state of task execution.
Once appointed to gather a resource, serfs will produce it infinitely, until discharged from this task.
Unemployed serfs (free citizens) pay a tax: 1 gold coin every 2 hours.