C636 Revelation

"Mr. Chen, how did my father find out? And Cheng'an, how did they know?" Jiang Nuan asked softly, her voice steady.

"It was that day! Jee Yumeng needed a blood transfusion, and the hospital's blood bank didn't have the rare blood type that matched. We decided to test your blood on a hunch, because I knew you were the most likely match