Write a 400-word review of Tulou.

The world cultural heritage Fujian Tulou Yongding Hakka Tulou is an excellent product of Hakka ancestors' inheritance and development of China traditional culture in the process of long migration, arduous entrepreneurship and mobile life, and it is also the crystallization of the wisdom of generations of Hakka ancestors. She is "the unique mythical mountain residential building in the world", which not only adds infinite charm to the residential buildings in China and even the world, but also has a great influence on the world architecture and human culture. General Secretary Hu Jintao visited the Hakka Tulou in Yongding, praising "Hakka Tulou is a treasure of Chinese culture and a model of harmonious coexistence between big family and small society" and encouraging Tulou people to "protect, inherit and make good use of this precious heritage left by their ancestors".

Fujian Tulou originated from Hakkas and rooted in Yongding.

Tracing back to the origin of Tulou, we must first understand the origin of Hakka dialect.

It is generally believed in academic circles that Hakkas are Han Chinese who migrated from the Central Plains to the south. These Han ancestors lived in the Yellow River valley and experienced at least five large-scale migrations. The Huang Chao Uprising in the late Tang Dynasty triggered the second great migration of Hakka ancestors. The invasion of Jin people at the end of Song Dynasty and the beginning of Yuan Dynasty triggered the third great migration of Hakka ancestors. The fourth great migration was in the late Ming and early Qing Dynasties, when Manchu people entered the Central Plains, which was called "moving lakes to fill Sichuan" in history. The Fifth Great Migration During the reign of Xianfeng and Tongzhi in Qing Dynasty, after the peasant uprising of Taiping Heavenly Kingdom led by Hakkas Hong Xiuquan failed, Hakkas began another great migration, moving to Hainan, Guangxi and other places respectively, and even crossing the ocean to make a living overseas. It is estimated that there are more than1.200 million Hakkas in the world, and Hakkas are all over the world. So some people say that there are Hakkas in China where the sun shines, and there are Hakkas in China.

Fujian Tulou is a large-scale group building with rammed earth walls. According to research, there were rammed earth houses in Shang Dynasty in China. The imperial city and palace walls of Chang 'an in Tang Dynasty were rammed earth walls, and the rafters in the city were also separated by earth walls. Fujian Tulou is a special product of the vicissitudes of life after Hakka people moved from the Yellow River valley to Yongding. It carried forward the ancient Tulou art and pushed it to the extreme. Can produce.