When the doctor tells the family that their daughter's condition is not good, Ling'er rushes in to find out what's wrong. He asks the doctor if he has a "wonder drug" that can cure the sick. The doctor says he doesn't have one, but he does have a "canon of herbs" that contains "1 billion spirit stones" . He also has "the pharmacopoeia" of the sage, which contains "900 million spirit stones." He also knows the "yin and yang" of astronomy, geography, astrology, and so on. He's got a "cheaper" version of the same book that contains the "remedies of the guzi" , which is basically a book on medicine written in the 16th century.