The little girl was very thin and pale, tears still staining her face: "You took my blood... will you let me and my mother go now",She's already three and a half... but her body is as weak as a two-and-a-half-year-old!,"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!"。