There are tens of thousands of earth buildings in Fujian. To ask which one is the most famous, it must be the Chengqi Building called "Tulou King". The earth building was once printed on a stamp. In 1986, the Ministry of Posts and Telecommunications issued a set of Chinese national residence stamps. The picture used was Chengqi Building. Chengqi Building is located in Gaobei Village, Gaotou Township, Yongding County, Fujian Province. It is one of the Gaobei Tulou Group. Yongding County is the county with the largest number of Tulou buildings in Fujian. The group of earth buildings has Gaobei Tulou Group, Hongkeng Tulou Group and Chuxi Tulou Group, all of which are world cultural heritage. Persimmon is a special product of Yongding. In the autumn and winter seasons, there will be scenes of persimmons on the square in front of the earth building or in the earth building. There are also dried persimmons in the building. Tulou is usually a family living together. These earth buildings usually have a history of more than 100 years or hundreds of years. Chengqi Building is a typical representative. Chengqi Building was built in the Ming Dynasty, but it was completed in the 48th year of Qing Emperor Kangxi (1709), and it has experienced 81 generations before and after 3 generations. The residence in the Chengqi Building is the name of Jiang. This earthen building is larger than the average earthen building. The underground wall of the ground floor is 1.5 meters thick and is extremely strong. It has not been poured for hundreds of years. There are 400 rooms in the earth building, and at most 800 people live. The earth building is a ring-and-loop structure, which is a total of four rings from the top.