Song Wu and his entourage met Zhang Qing, a vegetable garden, in Crossslope. Zhang Qing warned them not to live in Zhangjiadian Sun Erniang's shop, but Song Wu didn't listen and insisted on living in Sun Erniang's shop. When they came to Sun Erniang's shop, Sun Erniang served a plate of meat buns. Seeing that there were hair and nails in it, Song Wu suspected that it was a human steamed stuffed bun, so he asked Sun Erniang to make a steamed stuffed bun and bring wine. Sun Erniang drugged the wine again, but Song Wushi broke her trick and played along. When Sun Erniang was about to start work, Song Wu jumped up and fought with Sun Erniang. Zhang Qing can only do no harm on both sides, resulting in his own injury. Zhang Qing told Song Wu about Sun Erniang's life story. She and her father once took in four young buskers. These people turned to kill Sun Erniang's father as soon as they saw the money. They also destroyed her and sold her to a brothel. Sun Erniang later escaped from the brothel herself. Zhang Qing told Song Wu about his marriage with Sun Erniang, and Song Wu aimed to test Sun Erniang's feelings for Zhang Qing, which made the couple feel more harmonious. Finally, they and Song Wu became sworn brothers.
Is that enough?