Hey this trade circle is great it helps people with their infasture upkeep and starting costs and it raises population. And yes you need a tradding harbour to be a part of this reply to join and message me in game at Arnold12022 if you have to of these
TRADE CIRCLE
Water Arnold12022
Wheat
Aluminum
Lumber
Marble Kong92
Iron
Fish Kong92
Cattle Arnold12022
Sugar
Pigs
Spices
*Wild Card, this resource can filled by any other resource
Bonus:
Beer
Construction
Fast Food (3)
and others