Did you heard of Mosuo (Ladies Kingdom)in China ?No father in this place?

Yes and I have visited the region too.

However, you have happen into a rather biased view no how general "Hans Chinese" view with your comments" Adult women can choose have sex with anyone they want Therefore, there are no husbands or wives." which was also expressed by members of my tour group. Or that marriage is a Western concept, China views polygamy illegal too.

If you read the myths section of the wiki link it says:

http://en.wikipedia.org/wiki/Mosuo#Myths

"Although sometimes believed otherwise by outsiders:

Mosuo women should not be considered promiscuous

While it is possible for a Mosuo woman to change partners as often as she likes, few Mosuo women have more than one partner at a time. Anthropologists call this system “serial monogamy.” Most Mosuo form long-term relationships and do not change partners frequently.[8] Some of these pairings may even last a lifetime.

Fathers of children are commonly known

The large majority of women know their children's fathers; it is actually a source of embarrassment if a mother cannot identify a child's father"

Other myths and misconceptions about about Mosuo people are dispelled here

http://www.mosuoproject.org/myths.htm

http://www.mosuoproject.org/walking.htm

Likewise, today adult women all over the world, can choose to have sex with anyone they want and is possibility the leading cause of divorces or women being sentenced to death in certain countries.

Edit@ And I'm correcting a common misconception about Musco women what is wrong about that?

this Mosuo ''celebrity'' has clarified this topic like Lim Yuan said:

http://en.wikipedia.org/wiki/Yang_Erche_Namu

i loathe her though. she is obnoxious and loses too much chinese face. she is so ugly but described herself in every book that she is an angel.