Jiang Yi of the Qing dynasty wrote in his family's book of maxims that wives under the age of 30 and concubines under the age of 40 should be allowed to remarry if their husband has died, and that "family members are not permitted to prevent these women from doing so."
譬如清朝的蔣伊在蔣氏家訓中，明定三十歲以內的婦女、四十歲以內的妾媵，如果丈夫死了，可以改嫁，「親屬不許阻撓」！