" of " Lou Lan has appeared in many Tang poetry that we had read these two words, for example of Wang Changling " enlist row " write: " yellow Sha Baizhan wears Jin Jia, do not defeat Lou Lan to be not returned eventually. " but what should correct is the circumjacent country in Tang Dynasty period, without Lou Lan the country exists. According to historical data account, building orchid ancient country this name appears the earliest at Han Wendi 4 years, arrive all the time A.d. 445 years by annex of Northen Wei Dynasty, that is to say, lou Lan disappears after more than 100 years, ability some big Tang Wangchao, so be in fashion for a period, flourishing degree no less than why does Gu Guowei meet the Lou Lan of capital Beijing today does mystery disappear between one night? It is reported, the Xinjiang that building orchid ancient country is located in chinese mainland autonomous prefecture of the Monggol nationality of arris of Ba Yin Guo, be like condition of Qiang county north, luo Buhe with on the west, 7 kilometers of peacock wadi south bank are in, it is a Xiaoguo only, but the silk tea that Central Plains inland exports at that time the closest spruce goods must do business through here, building orchid country can say is center of a politics, economy, culture. BC 176 years, han Wendi receives a letter that comes from Hun, hun army mentioned expressly to already controlled area of the Western Regions above (Lou Lan belongs to the Western Regions one of 36 countries) , after accession of Chinese fierce emperor, the gest of big fellow army power deter area of whole the Western Regions, chinese fierce emperor also delivers the view to Lou Lan this country. The building Lan Xiaoguo that is placed between two countries is sufferring the long-term and mobbish plunder of sweat dynasty and Hun ceaselessly, final, crack begs the Lou Lan that put still is annihilate Yu Damo after all in Huang Sha.