Actually, Qiao Yin wasn't that angry with him.
She was more upset with Lu Shengqing, because Lu Shengqing was her patient, and she and Director Song had saved him. He had regained his memory and found his family but didn't tell them, which left Qiao Yin feeling rather cold.
He clearly knew that she was looking forward to his memory recovery every day, eagerly hoping that he too could reunite with his family.
"Also, I want to thank you, thank you for saving my elder brother, thank you for taking care of him for so long. I, and the Lu Family, owe you a life debt. In the future, whatever you request, you can ask me. You have that privilege."