Huaiyuan Building is located in the east of Kanxia Village, Meilin Town, Nanjing County, 54 kilometers away from Nanjing County. Huaiyuan Building was built in 1905-1909, and is the most beautiful and best protected double-ring round earth building. The building is 13 meters high and 38 meters in diameter, 34 rooms per floor, a total of 136 rooms, built for the Jian family. The most striking thing about Huaiyuan Building is the ancestral hall in the core of the inner courtyard, which is the place where the family children read "Si is the room". "Si is the room" is exquisite and beautiful, the upper and lower hall buildings cover an area of 190 square meters, the interior carved beams and painting buildings, simple and natural, and the book is strong. Huaiyuan Building is the second ring building. The architect is the architect of Zhencheng Building. The design of the building is quite neat. There is a gold plaque given by He Yingqin to help me. There is a Taiji pattern arranged with pebbles on the flat floor in front of the building. The earth building and the village are surrounded by rice fields and tea mountains, a peaceful pastoral picture. The foundation of Huaiyuan Building is more than 3 meters high with giant pebbles and three-in-one earth base, and the walls are smooth and unflashed. Standing on the outside wall of the building, the face against the wall upward, you can see the base of the building is small, the middle is large, the upper layer is gradually shrinking, like olive, this structure is in line with mechanics, can resist the wind, make the building stronger. The reason why it is called Huaiyuanlou has three meanings: First, miss the relatives of the distance, second, show that the owner of the building is from the far away of Henan "Huai" land, and third, teach the children of Jane's to have a great ambition.