Introduction to Maodetang: Maodetang was built in the 60th year of Qianlong reign of the Qing Dynasty, covering an area of ​​250 square meters. It is commonly known as the "inside house" and is "the first one out of the city from the east gate". His ancestor, Yu Lichen, abandoned his official position and engaged in business after winning the imperial examination. He also took charge of the temple's rental affairs. His family was prosperous and he was a humble man. At that time, he was known as "the business has spread to three provinces, and the family has no white people". The meaning of "morality" is to encourage their descendants to be moral in all their conduct.