It's been a while since the last time we saw the captain, and he's feeling a little sick. He's not sure what's wrong with his body, but he knows that he needs to improve his fighting skills. He asks his brother-in-law to give him more of the "marrow pill," which is a kind of medicine that harnesses the "yin and yang" of a person's body to make them stronger and more agile. The captain says that he can use this medicine to change the way people practice martial arts. He tells his wife, Miss zhou, to behave herself, since she's excited to see him dressing up for her. He also tells her that he and his wife are a married couple, so he doesn't have to ask for a divorce. He says he'll never betray his wife.