These two sentences, paired with the undisguised murderous intent in Tang Shigong's eyes, already explained the problem quite well.
Xin Yi was in disbelief and panic: "Ah Dad... don't you remember Xin Yi?"
Tang Shigong's eyes shifted, looking at Xin Yi, frowning as if trying to recall something.
"In the second year of Taixing, didn't Duke Yan settle you and your mother in Fengxian County?" Li Mu suddenly asked.
Xin Yi nodded.
Tang Shigong looked surprised: "Fengxian County?"
Gu Ning raised her hand, revealing the old and almost worn-out patterns of the gold Yue Que.
Xin Yi's eyes lit up again upon seeing it: "Ah Dad, this gold Yue Que was left to me by you!"
"Was your biological mother's surname Yu?" Li Mu asked again.
Xin Yi shook her head: "My mother's surname is Xin—"
"No, her surname is Yu!" Tang Shigong took the gold Yue Que, casually glanced at it twice, and said, "This gold Yue Que is indeed mine—"
