The walking marriages widely adopted by the Mosuo ethnic group is a unique marriage custom that is deeply related to its social and cultural traditions of the matrilineal family system. In a walking marriage, the couples do not live together and both stay in their own matrilineal family for their whole life. The marriage and propagation of offspring is realized through "walking" by male. The women open their doors to their lovers every evening, and the men walk home to work in their mother's household every morning. Neither of them is a member of each other's family. The woman and man in this relationship call each other A-xia, which means lovers in the sense of husband and wife. The best place to learn about the "Walking Marriages" of the Mosuo ethnic group is the vilages around the Lugu Lake in Lijiang, Yunnan Province.