I got below info
from a Chinese Fansite. Here I would translate them for you . Now check it out.
Frist, you need to the character name of the creator. In this family, it can contain 8 member. You can copy Command and the character name of the members.
Second, the family and other forces can add into the third forces.(Here I do have a clear idea about it.)
Third, the title of this family can be changed but the character name can not be changed.
Fourth, the members of this family can quie this family anytime if he wants.
5. The most important function of the family is to maitain the residence and the space land. If you want to share the lande with others, you can change the llimits of authority to the family shared. Or others can not share your land.
I know there would somthing wrong, welcome any correction.