The brigade leader, Wang Mingtao, already told them what happened earlier on, thus Gu Qingyao knew that Li Dahai actually admitted that the Gu family beat him up. Chen Feng told her some things and she understood that the Li family wanted to trick Li Dahai into staying in the Gu's so that her young aunt could take care of him and their family would be reunited.
Li Dahai certainly hoped to be able to get back together with her young aunt and Nie Jiao must have said many things to him.
No matter how Li Dahai thinks and whether he was tricked by Nie Jiao, he did accuse and put the charge on the Gu family.
He helped his brothers and sisters-in-law slander the Gu family.
This was sufficient to arouse Gu Qingyao's anger.
Not only was this fellow dim-witted, but he also turned out to be such a person. He needs to be punished!
Gu Yunshen discussed with them for a while before coming to check on Li Dahai's injuries.