These ethnic- and class-based traditions themselves challenged the legitimacy of patriarchal marriage.

Though the Mongols in Henan Mongolian Autonomous County had changed same as Tibetans, they still have strong ethnic identity, inner marriage is mainly because of major Mongols population.

Marriage between races and ethnic groups has reached an all-time high in the United States as public acceptance has grown, according to a Pew Research Center study on Thursday.