There is evidence that sororate marriage existed in ancient China. Junior Levirate marriage and Sororate marriage practices are allowed. The female equivalent of fraternal polyandry is sororate marriage. All tribes practiced sororate and levirate marriages. Both levirate and sororate may result in a man having multiple wives. Sororate marriage is a custom in which a man marries his wife's sister(s). Sororate marriage is practiced by the Swazi people and for the same reasons as stated. Sororate continued throughout the length of the Liao dynasty, despite laws banning the practice.