The Nanjing Earth building is the perfect model that combines the earth material and the wooden structure, it is well known to the whole world for its rational construction and the full functions. The Nanjing county is the hometown for over 15,000 earth buildings of different shapes, height and other characteristics. Besides the round shape we usually see, there are also other rare shapes of the building such as fan shape, turriform shape, umbrella shape and other ones, 16 kinds in total. A architect from Japan, once highly praised the earth buildings as the "flying saucers dropped from the sky, or the mushrooms grow from the underneath.". This area also covers the tallest, smallest, biggest, weirdest and the most complete ancient earth buildings. The biggest one-Shuyang Shunyu building was built in 1937 with a 4-floor structure of 288 rooms, while the smallest one-Cuilin building covers only 36 rooms in total.