An old picture revealed everything.

Earlier Murphy has called Lifen and asked her to meet. She has told him that she was heading to Li Corporation, so he had especially chose the lunch break to meet her.

He knew she has newly joined the CEO position, hence doesn't wanted to interrupt her during her work.

"Uncle Angel!" 

When Lifen called him from behind with the same words that he was used to hear from the little girl twelve years ago and also she has given after meeting them as Wu Lifen, he reprimanded himself for being so stupid to not realize it before.

How can he not coordinate the similarity between the little girl and her before? 

Even after finding her so similar, he never tried to cross-checked Deming's fact before. But there was no use of crying over the spilt milk now. The time has already been lost, necessary damage has already been done, now nothing can be get undone to correct it.