What is the story of the crane boxer?

In the chapter, White Tigers, the narrator tells a story about the woman who invented white crane boxing. Legend says that the woman was a fighter, trained by “an order of fighting monks.” One morning, she tried to use her fighting pole to move a white crane that landed outside her window. The crane broke her pole in half. The woman recognized the crane as a spirit and asked it to teach her how to fight. Purportedly, the crane cried out in agreement; from then on, white crane fighters imitated the cry when boxing. The crane transformed into an old man and became the woman’s boxing teacher.