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","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!",However, Dr. Li did not remove the needle but instead changed to a new blood bag.... Fifty milliliters, one hundred milliliters,... five hundred milliliters.。