> For the complete documentation index, see [llms.txt](https://cryptopolium.gitbook.io/whitepaper/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://cryptopolium.gitbook.io/whitepaper/cards/trading-posts.md).

# Trading posts

Trading posts are grouped by province and can be in groups of two or three. If the player manages to buy all the posts in a province, he can start upgrading them and not be able to swap them with his opponent.

<figure><img src="/files/NFWfby4riLybKuREYuKt" alt=""><figcaption></figcaption></figure>

{% hint style="info" %}
If the player completes a province, he collects a double fee in the zero-level posts.&#x20;
{% endhint %}

The player can upgrade the posts up to level 3 and the tax to be charged will increase proportionally.