World culture heritage, national 5A scenery spot, major historical and cultural site under state protection. With fund donated by the Jian brothers whom at that time resided in Burma, Huaiyuan Lou is built in 1909. The building covers an area of 1384.7 square meters and its floor space is 3468 square meters. Besides its rich cultural deposits, Huaiyuan Lou is the best preserved, most exquisite double circle Tulou in Fujian. Culture and Etiquette Hall is a building within Huaiyuan Lou. The hall is built in exuberant five-phoenix-building style with four main columns and five purlins. Sishi Chamber in Huaiyuan Lou functioned as a private school. Though cramped and humble, this chamber represents that forefathers of Huaiyuan Lou upheld civilization in great esteem. Sishi Chamber exemplifies the integration of Confucius culture and construction style of South Fujian. Couplets and ornaments in the chamber well bespeak Confucius thought of keeping loyalty and filial piety as family traditions while insisting on honest hardworking and self-cultivation. Thanks to unique formula and superb technique, the walls of Huaiyuan Lou remain smooth without any signs of erosion. The technique applied in the construction of the leaning walls of Huaiyuan Lou fully utilized the diverse features of big cobblestones and rammed earth, and had the walls. The skill of building leaning walls had reached its maturity when Huaiyuan Lou was built. This technique is originated in a method of building walls by stamping earth between board frames which had been popular in the middle and lower reaches of the Yellow River. With thousands of years’ improvement, the leaning wall technique eventually is recognized as the most brilliant accomplishment of rammed earth civilization.