Why was Tian Xia the first person Lu Er thought of?
Because Xiao Li came to Tian Xia's ward to investigate this matter!
Besides, back then it was Lu Er herself who brought it up—that Tian Xia felt sympathy for Gu Ying and even took a bullet for him. There's definitely something fishy there.
See, now they're here to investigate, aren't they?
She looked at Xiao Li and analyzed, "Back then in the unit, when Yang Leman was let go, everything pointed to Tian Xia. But later everyone said Tian Xia is a computer whiz, so she had no need to do that at all! But then I thought about it—what if that was just a smokescreen? Just because we all thought it couldn't possibly be her, we ended up helping her cover it up! Otherwise, how do you explain her shoving Gu Ying away later? She clearly treats Gu Ying differently! Xiao Li, you guys think I'm right too, don't you?"
Xiao Li: …
Tian Xia: …
Grandma Ye: …
Actually, Xiao Li had gone to Gan Di's ward first.
