Zhou Taohua in Mountain Village is not considered a good marriage prospect, because many people know about her health issues and fear that she may not be able to bear children, which is important to farming households that value lineage, so no one dares to marry her. However, it's different in Beiyu City. In ancient times, information did not travel well, and the rumors of Mountain Village couldn't reach there.
Still, Bai Ruozhu felt that what her mother said wasn't entirely without merit. With Zhou Taohua's character, she really might not find a good family to marry into, and even if she did, with the way she behaved, she certainly wouldn't have good days ahead.
Just look at her lovesick appearance when she saw Second Brother and Achun—it was truly embarrassing. Fortunately, they were about to leave, so Zhou Taohua would have no way to cling on to them.