The ancient house was built in the Qianlong period of the Qing Dynasty. The old owner of the house, Jin Wenxuan, was a big tea merchant. In feudal society, the merchants were rich and not expensive, and the merchants were the lowest. So their residences could not be built as grand and luxurious as the official residence. And the court also stipulates that the door of the merchant cannot be opened south. The entire facade of Yu Qingtang is a "shang" word. The upper part of the door cover and door building constitutes the "shang" word. The blue stone door is a "mouth" word. The blue brick is built outside the door to form the "door" word.