"They're going to take Ningning's heart... Mom told me to call you, Dad! Please save me...","Do you know, my son has a congenital heart defect… I've long wanted to give him a new heart, but unfortunately panda blood is very difficult to match with other hearts!",As he uttered the last word, Gu Nanfei's face was contorted into a demonic grin. "This is the final time. Take more blood! After the surgery, my son's body will be very weak and need plenty of blood to nourish him."。