Why is the place of governance of Nuer Gandusi located in such a remote place?

Nuergan is the former site of the Yuan Dynasty's "Marshal Zhengdong's Mansion", and the Ming Dynasty's "Nuergan Dusi" here is just a continuation of the old system - similar to the Xiongnu's "servant Duwei" city set up in the Western Regions, which was later inherited by the Han Dynasty's Western Regions Protector (Luntai).

The reason why the Yuan Dynasty set up the "Marshal of Zhengdong" here was to try to copy Japan's Hokkaido and Tohoku regions through the Tatar Strait (now known as the Okhotsk Strait).

The Han general Zhang Cheng (who had participated in the expedition to Japan, and after a typhoon, collected the remnants and returned to the Yuan Dynasty smoothly) led his troops to guard the town of Tuntian in Nuergan for a year.

Tracing back to its origins, the Heilongjiang estuary area where Nuergan is located, in ancient times, was the Kamchatka Peninsula, the Kuril Islands, Sakhalin, Hokkaido and the mainland's Heilongjiang River basin goods trading point, in a long period of time, are the first area, this function still existed in the Qing Dynasty, when the Ezo people of Hokkaido imported silk fabrics from China from this way, and then transmitted to Japan, which was called "Ezo Nishiki" by the Japanese

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A big game of chess.

It is a body established to strengthen the administrative jurisdiction of the Nuergan region.

Nuer Gandu Division is the highest level of administrative agency in the Ming Dynasty that governs the vast areas of Heilongjiang and the Ussuri River Basin, and has more than 400 Wei Nian Rang sections in its heyday.

It is the highest local military and political integration system set up by the Ming Dynasty in the lower reaches of the Heilongjiang River to govern Heilongjiang, Wusu, Tangzili River basin and other regions.

During the Ming Dynasty, the Heilongjiang River valley in northeast China was inhabited by the Jurchen people. In the first year of Yongle in the Ming Dynasty, Zhu Di sent ** to the lower reaches of the Heilongjiang River basin to appease the Jurchen tribes, and set up a number of detention guards in Nuergan and other areas. In the following five or six years, more than 130 health centers were established in the lower reaches of the Heilongjiang River and the Ussuri River basin.

In the seventh year of Yongle, in order to strengthen the management of these guards, the Ming court changed the Nuer Ganwei to the Nuer Gandu Division, and appointed Kang Wang, the commander of Dongningwei, as the commander of the capital. The administrative office of Nuer Gandu Division was located in Telin, the seat of the Marshal of Zhengdong in Liaoyang Province during the Yuan Dynasty, at the confluence of the Amur River and the Amgun River in present-day Russia, about 200 kilometers away from the mouth of the Heilongjiang River.

Nuer Gandu Division is the highest level of administrative agency in the Ming Dynasty to govern the vast area of Heilongjiang and Ussuri River basins, with jurisdiction from the Onen River in the west, to the Outer Khingan Mountains in the north, to Sakhalin Island in the east, and to the Yalu River in the south. In its heyday, it had more than 400 health centers.

The Ming Dynasty appointed local tribal leaders to serve as the governors, commanders, thousands of households, and suppressors of the guards, and gave them a letter of seal, so that they could manage according to their own national customs, and the guards were not subordinate to each other. The Ming Dynasty sent **irregularly** to the area under the jurisdiction of the Nuer Gandu Division for inspection.

In order to transmit official documents and decrees, personnel and materials, the Ming Dynasty opened up a post route from Nuergan to the interior on the basis of the original post station of the Yuan Dynasty. This post road starts from Manjing Station near Nuer Gandusi in the north, goes south along the Heilongjiang River and Songhua River, passes through Liaodong Dusi, and finally arrives in Beijing, with a total length of more than 2,500 kilometers.

In the late Ming Dynasty, the Houjin established by Nurhachi rose, and the Nuergan region was gradually controlled by the Houjin, and the Nuergan Dusi withdrew from the historical stage.

Nuergandu Sizhi was located in Nuergan (now Telin) on the east bank of the lower reaches of the Heilongjiang River

The area under the jurisdiction of Nuergandusi extends from the Onen River in the west, to Sakhalin Island in the east, to the Trans-Khingan Mountains in the north, to the Sea of Japan and the upper reaches of the Tumen River in the south, and includes a vast area from the Heilongjiang River basin and the Ussuri River basin to Sakhalin Island. It roughly includes the present-day Jilin Province, Heilongjiang Province, the northeastern part of Inner Mongolia and the Russian part to the west, the east of the Ussuri River, and the outer Xing'an Mountains and the north. The area under its jurisdiction is widely equipped with guards and institutes, and is used as the local military and political system to which the capital belongs.

Before and after the establishment of the Nuer Gandu Division, from 1403 to 1409 (the first year to the seventh year of Yongle in the Ming Dynasty), more than 130 guards were set up in the Songhua River, Nenjiang River, Onen River, Jingqili River, Hengluo River and Ussuri River basins, and in the Wanli period (1573-1620), the area under the jurisdiction of the Nuer Gandu Division increased to Wei 384, Suo 24, Ground 7, Station 7, Zhai 1, commonly known as 384 Wei. From the end of the 16th century to the beginning of the 17th century, the Jianzhou Jurchens led by Nurhachi gradually replaced the Ming Dynasty's rule over the Heilongjiang region.