read this for more information about the guild city.
http://do.us.changyou.com/bbs/showthread.php?t=2085
You could learn and upgrade guild skills if you have enough gold and guild contribution.
The construction and skill you can learn
Technology 1(Lv 1):engineering
Commercial 1(Lv 1):travelling trade
Agr. 3(Lv 3):Max HP Up(Maximum HP)
Commercial 3(Lv 3):Max MP Up(Maximum MP)
Bank 2(Lv 3):Regimen(Maximum Vigor )
Bank 2(Lv 3):Impulse(Maximum Spirit)
Technology 3(Lv 3):Quick Draw(Vigor growth)
Technology 3(Lv 3):Resilience(Spirit growth)
The construction and skill you can upgrade
Industry 1(Lv 1):casting, clothing, mining, crafting, inlaying
Agr. 1(Lv 1):planting, herbalism
Commercial 1(Lv 1):fishing, travelling trade
Expand 1(Lv 1):engineering
Wine 1(Lv 1):cooking, regimen
Pharmacy 1(Lv 1): pharmacy, pharmacology
The construction of the guild can buy the recipe
Industry 1:craft recipe
Military 1:casting recipe,clothing recipe
Expand 1:engineering
Wine 1:cooking
Pharmacy 1：pharmacy
All of the recipes above are guild research.
One of the important functions of guild is to research the different recipe of life skills.
Bank 1 can research commercial products, after upgrading to Bank 2.
Skill research,if the construction satisfies the condition of level, guild leader or deputy can go to the corresponding NPC to start the research.
A guild can research a project only at one time. The project being suspended will be turned on, and the progress starts from 0 regardless of the past progress. In the research, major construction will release research quest progress. The research progress varies with the research level.
If you want to upgrade your life skills beyond lvl 5, you can upgrade it from city. So contribute to your guild and you will be rewarded handsomely!
ps: taken from dragon oath help
Subject: About guild city 
Thu Nov 26, 2009 10:54 am
