Yilan is a provincial historical and cultural city with a long history. The discovery of Walkenhada Cave proves that there were human activities as early as 6000 years ago. In the Qing Dynasty, there was a yamen with three surnames, also known as three surnames, which was the birthplace of the Manchu dynasty. At the beginning of the Qing Dynasty, it was called Hetan Gashan (known as Gucheng Tun in Chinese), and later it was inhabited by Hezhe, Ke Yikele, Nuyale, Hu Hali and Yilan Hala. In Manchu, Yilan is three and Hala is the surname, so it is called three surnames. One of the important towns in Northeast China in the early Qing Dynasty. Therefore, it is located at the intersection of Yilan, Mudanjiang and Songhua River in Heilongjiang. It is close to the south bank of Songhua River, adjacent to the Woken River in the east and surrounded by the river on three sides, and is an important land for land and water transportation. Liao country is the place where the city of the five countries gathers in Yueli, and the metal lane changes. Yuan set up a tiger force to change the government here, and lay in pity for the government (now near Yilan). Ming is here to buy and defend. Jianzhou Jurchen once lived here. The Hezhe people in Shumulu moved here again.