The Dian, being bearers of the Power of Bronze, have some Temnple-based perks. The first one is that in any game, the very first city to be held by a Dian player will already have a Temple in it. The second is that the Dian can receive Religion upgrades for free, thus making their cities fairly tough to take on in the early game, as well as spreading their influence on the map further than most factions in the early game.
Although caravans passing along trade routes can collect wealth, tax however is the main way by which you can enrich your coffers with wealth.
Tax ensures that you can collect money from any active economic activity which goes on in your realm, as well from the percentage of territory you control on the map.
Note: Level 4 is attainable only with Centralisation.
Five Pillars is available to the Chagatai faction in Renovatio Europam. To conterbalance it, the Chagatai however are not allowed to build any naval unit other than a Dromond until the Imperial Era is reached.