Introduction to the plaque: In the hall inside the third door of the east courtyard, there is hung the "Liu Yu Plaque", which is known as one of the "Top Ten Famous Plaques" in the country. To return to nature, leave an inexhaustible salary to repay the court, leave an inexhaustible wealth to repay the people, and leave an inexhaustible blessing to repay the descendants." This shows the soul of this family culture. Plaques such as "Ke Shen Jue You", "Xiang Mian Xue Xue" and "Zhi Zhong He" tell people that the Kang family regarded "reading", "doing good" and "prudence" as heirlooms, which they relied on for survival and development. spiritual support.