The Lu family is related to the Guan family and had some responsibility to take care of Feng Qingxue and her brother when their mother in Guan Cheng abandoned them. Feng Qingxue is sympathetic towards the two helpless children. If she wasn't sympathetic, she wouldn't have taken on so many responsibilities. She lost count of how many people she had saved while she was out.
After confirming the exact address of Guan Cheng and Guan Yu, and asking their father for evidence to prove their identity to Guan Cheng, she finally left after dinner and cleaned up the kitchen.
Upon leaving the cowshed, she didn't head straight home, but instead went to Wang Zhenguo's house.
Visiting the Wanglou Brigade without stopping by her uncle's house felt unusual.
However, upon arrival at Wang Zhenguo's house, she found the door locked and the neighbours didn't know where the Wang family had gone. All they could tell Feng Qingxue was, "They might have gone to visit relatives."