Here, IGG has released an overview of its guild system in Zu Online (http://zu.igg.com).
A guild refers to a spontaneous organization made up of players in Zu they communicate with other fellows, and do contribution to consolidate their own guild, thus laying foundation for future triumph.
In a guild, official rank stands for your status position and power held. It is classified into Guild Lord, General, Lieutenant, Knight and Soldier.
Once a player reaches level 60 and has a Reputation points over 20,000, he will be able to apply to the Guild Envoy for founding his own guild with a sacrifice of some glowstones and then he has the right to manage his guild.
For more information please read here: