Women of the Song Clan were not permitted to marry outsiders. Instead, a husband would be sought from the outside, who would then marry into the family. Upon marriage, the new son-in-law would then become a Conclave Cultivator of the Song Clan.
Throughout the years, many Sects had desired to infiltrate the Song Clan. However, because of their strange and ancient marriage custom, those Sects had long since vanished. The Song Clan, however… still remained.