The Sanjiang Plain, known as the Great Northern Wilderness, has always been regarded as an ancient wasteland. But the research results of Chinese archaeologists show that:
Since the 1980s, archeologists have successively discovered more than 600 ancient sites here, and there are more than 340 sites in the Qixing River Basin alone in the hinterland of the Sanjiang Plain. The sites are even more densely distributed than today s towns and villages. These ancient sites are concentrated in the northern foothills of Wanda Mountain and in various small river basins. The low hills at the junction of the mountains and the plains, the terraced floodplains by the river, and the high hills in the swamps are distributed .
The ruins of the Qiang site are colorful, some occupying an area of more than 1 million square meters, with hundreds of houses and building fortified walls; some occupying only 1,000 square meters, with several houses and no defense facilities. Some fences are several meters high, with corner towers and horses for defense, and trenches several meters deep outside the walls; some fences are only over a meter high and have no additional facilities. Some fences are built on the periphery of the settlement for defense between the settlements; some fences are built inside the settlement for isolation within the settlement.
According to research, the ancient ruins in the Sanjiang Plain appeared in the Han Dynasty, about 200 years ago, and disappeared during the Three Kingdoms period before 1600. Numerous ancient residents suddenly appeared on the Sanjiang Plain. Did they stumble upon the rich resources here , or did the climate here suddenly become suitable for human habitation? They suddenly disappeared from the Sanjiang Plain again. Was it due to alien invasion or a natural catastrophe? In the 500 years from Han to the Three Kingdoms, which ancient people lived on the Sanjiang Plain? What kind of material culture and spiritual civilization did they create on this black land? Do residents living in different natural environments, such as mountains, plains, and swamps, engage in different economic activities? Do you have different habits? Does the non-standard settlement reflect the difference in hierarchy and class division in the society at that time? Do the high walls and deep trenches reflect wars betw een nations or clashes between clans?
In order to decipher these ancient mysteries of the Great Northern Wilderness and reconstruct the Han and Wei civilizations in the Sanjiang Plain, with the support of the State Administration of Cultural Relics, the Heilongjiang Provincial Institute of Cultural Relics and Archaeology has formulated the Architecture Plan for Han and Wei Sites in the Qixing River Basin Seven Star River Project. The plan is based on the preservation status of the Han and Wei sites in the Sanjiang Plain and the development of world archeology. After the prosperity of the Han and Wei dynasties, the Sanjiang Plain has been silent for nearly 1,500 years, and it was not until the 1950s and 1960s that a wave of pioneering waves was set off. Since the settlement was not severely damaged after it was abandoned, it is basically how many settlements there were then, how many sites there are today, and how many buildings there were and how many ruins today. It is rare in the world to preserve its integrity.
Heilongjiang Provincial Institute of Cultural Relics and Archaeology later excavated the friendship Fenglin city site in Qicheng District twice. Fenglin City Site is located on the north bank of the middle reaches of Qixing River and covers an area of about 1.2 million square meters. It is the largest of the Han and Wei sites in the Sanjiang Plain. Two excavations revealed an area of about 2,300 square meters, cleared 28 sites, more than 40 ash pits, and unearthed more than 1,000 pieces of relics. The city site has two morning and evening residents. The late residents built a 490-meter square city in the center of the city site. The city wall is about 4 meters high, and each corner has a corner tower protruding outward, about 6 to 5 meters high.; In the middle of each of the four walls there is a horse face protruding outward, about 5 meters high; outside the wall there is a city moat with a width of about 15 meters and a depth of about 4 meters. When the late resident s left Fenglin, almost all production tools, weapons and decorations were taken away, while the pottery living utensils that were not easy to carry remained in the house. A fire destroyed all late buildings in Qicheng District, resulting in the final abandonment of Fenglin City .