Introduction to Wenlou: There are two columns in the courtyard of Wenlou. On the east column there is written the first couplet "Little eldest sister goes up to the river and sits north and faces south to eat". The second couplet on the west column is still missing. It is said that when Qianlong was passing by Hexia on his southern tour, he heard that Xiaolou had a unique "food and gambling" culture, so he invited Ji Xiaolan, a bachelor, to visit the Xiaolou in person. Unexpectedly, the emperor and his ministers were stumped by the first couplet that a little girl casually said. They couldn't think of the second couplet. They were defeated and paid the bill for the banquet. Later, they named the small building "Wenlou". Since then, Wenlou has become famous, but the first couplet written by the little girl has not been matched by anyone for hundreds of years.